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Category Archives: Insights

Foot Odour and Smelly Feet

The feet actively supporting the rest of the body, tend to be covered up all day. Thereby restricting the follow of air that helps reduce sweat and decrease bacteria activity on the feet.  Which can cause the feet to smell worse than other parts of the body. Smelly feet and foot odour can become problematic and if not treated accordingly leads to not only embarrassing moment, but affect your self confidence and freedom to wiggle those feet of yours

At one point in time we all tend to sweat and perspire on the feet  due to several reasons like those listed below. When these sweat itself can not evaporate then it leads to smell or stinking feet. This is usually caused by skin bacteria breakdown and secretes. Fungal infection, such as Athletes’ feet and other factors listed below can cause foot odour. 

To help prevent this condition of smelly feet or foot odour at the office, during sport practice, at your loved ones home or just simply stretching your feet out at garden or when having a picnic at the park. Dr. Babajide Ogunlana has a few tips: 

  • Avoid  the use of shoes that are tight to the feet as this can help reduce heat that makes the feet sweat and feed the growth of bacteria. Doing this also helps to avoid you developing conditions such as  bunions, toes fungus and corns and callus.
  • Clean your feet regularly with soap and water at least once a day and more if you do rigorous activities such as exercising, running , sport and walking. Take your time to dry your feet thoroughly afterwards, especially between your toes.
  • Have an extra pair of shoes so that you can rotate your shoes daily. This will give them a chance to air and dry at least 24 hours before the next wear. You can use Clean Sweep an antimicrobial Shoe Protection Shield, clinically proven to inhibit the growth of odor-causing bacteria, fungus, and mold. In your shoes at the end of the day after wearing them. Antiperspirant spray  or deodorant can help your feet stay dry or the use of foot powder to absorb sweat from your feet.
  • Use wool or cotton socks  preferably  and not nylon,  as they help to  absorb moisture better. Change your sock at least once a day, use sports socks and medicated insoles that are made to keep feet dry, and special antibacterial socks, which have a deodorising effect for your feet and shoes.
  • Avoid going barefoot in public space and communal facilities like gyms, bathing places and swimming pools. It is very easy to pick up germs, such as bacteria, fungus, and warts
  • Wear flip flops and when practicing yoga, clean your feet with antiseptic wipes or hygienic baby wipes in case you don’t have access to a shower right after class.
  • Good foot hygiene is essential , keep toenails trim and clean and remove callused skin with a foot file. Get a foot soak like using a salt bath, tea soaks or apple cider vinegar will help with callused skin and bacteria.

 

  • Reduce and if possible avoid the consumption of refined carbohydrates. Instead, take a balanced diet, with enough fruits & veggies and plenty of water.  

Condition that can lead to such foot odour and smelly foot are; 

  • Fungal Infection
  • Standing All Day 
  • Overactive Sweat Glands
  • Genetics
  • Injury Due To Structural Tissue
  • Bacterial  Breakdown On Skin
  • Hormonal Changes
  • Daily Stress
  • Poor Personal Hygiene 
  • Wearing Same Shoe Everyday Without Airing Them

Does Psoriasis Or Fungal Infection Make Patients More Vulnerable To COVID-19?

Psoriasis, may be at higher risk for the COVID-19 virus

The authors of a recent study suggest that patients with some dermatologic diseases, such as superficial fungal infections and psoriasis, may be at higher risk for the COVID-19 virus, due to a possible similarity between cutaneous and mucosal immunity.

In the study, published by Dermatologic Therapy, researchers assessed dermatological comorbidities of 93 patients with the COVID-19 virus. They found that the most common skin conditions in this patient cohort in the past three years were superficial fungal infections (25.8 percent), seborrheic dermatitis (11.8 percent), actinic keratosis (10.8 percent), psoriasis (6.5 percent) and eczema (6.5 percent).

In addition, 17 of the patients in the study also presented to the dermatology clinic in the last three months. Among this subcohort, the most common dermatological conditions included superficial fungal infections (25 percent), psoriasis (20 percent) and viral skin diseases (15 percent).

Tracey Vlahovic, DPM, FFPM, RCPS (Glasg), says the study authors have made broad assumptions and do not mention other comorbidities or contributing factors. She adds that the study is also problematic since it combines groups receiving topical and systemic/biologic therapy, and suggests that both groups are at risk. Dr. Vlahovic, who is board-certified by the American Board of Foot and Ankle Surgery, recommends monitoring the National Psoriasis Foundation and the International Psoriasis Council websites for guidance.

“The National Psoriasis Foundation recommends those who are on systemic and/or biologic therapy should remain on therapy unless they develop a COVID-19 infection. Patients who have other comorbidities should speak with their physicians regarding staying on their current treatment or changing it,” maintains Dr. Vlahovic, an Associate Professor in the Department of Podiatric Medicine at the Temple University School of Podiatric Medicine.

Joel Morse, DPM agrees that the premise that those with fungal infections or inflammatory skin disease are more likely to contract COVID-19 is suspect.

He wonders if major comorbid conditions such as diabetes could be contributing to an increased risk of developing the COVID-19 virus. Can the virus move through the skin if the stratum corneum is compromised? These are important questions to consider,

The National Psoriasis Foundation recommends those who are on systemic and/or biologic therapy should remain on therapy unless they develop a COVID-19 infection,” says Tracey C. Vlahovic, DPM, FFPM, RCPS (Glasg). (photo courtesy of Tracey C. Vlahovic, DPM)

says Dr. Morse, a Past President of the American Society for Foot and Ankle Dermatology.

Annette Joyce, DPM concurs that this study has limitations including: a small sample size; lack of specificity as to the location and type of fungal infections involved; and failure to link immunosuppression specifically to these superficial fungal infections.

“Fungal infections of the nails and skin are harder to treat in some patients due to immune system phenotype,” says Dr. Joyce, the Medical Conference Chair for the DERMfoot conference.

Dr. Joyce also notes that organ-specific immune response in the evolving knowledge of antifungal immunity could play a role in future immune-based COVID-19 therapies, but there are still so many unknowns.

Dr. Morse advocates for investigation of other viruses in patients with skin disease, and whether this heightens the risk for infection.

“When someone is in the hospital with COVID-19 life- and limb-threatening issues, we are probably not looking for tinea pedis or scaling on the elbow … but maybe we should,” suggests Dr. Morse, who is board-certified by the American Board of Foot and Ankle Surgery.

Can Adding Plantar Plate Repair To A Metatarsal Osteotomy Yield Better Results For Forefoot Metatarsalgia?

Regardless of the degree of plantar plate injury, adding a plantar plate repair to a shortening second metatarsal osteotomy may improve outcomes, according to a recent study published in the Journal of Foot and Ankle Surgery. 

In a prospective study, the authors evaluated 86 adult patients who had second metatarsal Weil osteotomies with and without concomitant plantar plate repair for sub-second metatarsal head pain over a 3.5-year period, and followed them for one year. Patients in the group who had a plantar plate repair with their second metatarsal osteotomy showed better foot-specific quality of life and pain scores at one year despite this group having more severe baseline injuries to the plantar plate. Researchers noted no difference in pre- or postoperative radiographic parabolas, second toe alignment or complication rates between the two groups.

Adam Fleischer, DPM, MPH, FACFAS, the lead author on the study, shares that after successful plantar plate repair from a dorsal approach, he observes patients are less “aware” of their previous foot ailment, which correlates with a higher level of confidence and higher quality of life scores.

Erin Klein, DPM, MS, AACFAS, a co-author of the study, finds in her practice that repairing the plantar plate helps with stability of the MPJ as well as pain.

Dr. Fleischer notes that in his experience, magnetic resonance imaging (MRI) and ultrasound both correlate closely with intraoperative evaluation of the extent of plantar plate injury, which he finds helpful during operative repair.

Dr. Klein agrees. She elaborates that a special MRI protocol with 0.2 to 0.3 mm slices through the metatarsal head/plantar plate region will help the surgeon understand the pathology much better.

“Correcting instability by repairing the plantar plate and then addressing the deforming osseous force (metatarsal length) provides pain relief and improved function postoperatively,” explains Dr. Klein.

Lowell Weil, Jr., DPM, MBA, FACFAS, a co-author of the study, emphasizes the clear necessity to address and correct metatarsal length.

“The plantar plate is a truly important structure that one should repair appropriately when pathology is present,” notes Dr. Weil, CEO of the Weil Foot and Ankle Institute. “Doing this combined procedure yields the highest level results in our research.”

“If patients demonstrate clinical instability of the lesser metatarsophalangeal joint and require a Weil osteotomy, (I recommend) a low threshold for anatomic repair of the plantar plate,” says Dr. Fleischer, who likens it to mechanical instability of the lateral ankle, which benefits from imbrication and advancement of the native tissues.

Are There Identifiable Trends In The Organisms Involved In Osteomyelitis?

What organisms might one expect to see upon bone biopsy in cases of osteomyelitis? A new study in the Journal of Foot and Ankle Surgery takes a closer look at patterns that may help in prescribing effective antibiotics.

Reviewing two random cohorts of 151 patients each in 2005 and 2010, the authors examined demographics, comorbidities, microorganisms found on bone biopsy and culture, location and pre-biopsy antibiotic use. Gram-positive bacteria, specifically methicillin-sensitive Staphyloccus aureus (MSSA), was most common in both groups. However, methicillin-resistant Staphyloccus aureus (MRSA) decreased from a prevalence of 28.3 percent to 10.6 percent from 2005 to 2010.  The most common gram-negative bacteria was the Pseudomonas species and patients with peripheral vascular disease exhibited a higher incidence.

Mitzi Williams, DPM, FACFAS, one of the authors on the study, was not surprised by the results as they align with her clinical experience.

Regarding the reduction in MRSA between 2005 and 2010, Dr. Williams personally feels the reason is multifactorial and could include antibiotic stewardship and striving to minimize admissions and returns to the operating room.

Windy Cole, DPM agrees that the findings correlate with her clinical practice. She adds that S. aureus is readily found in the environment as well as the normal skin flora of healthy individuals.

“It is when the bacteria enter into the deep tissues or bloodstream that potentially serious infections can occur,” explains Dr. Cole, the Director of Wound Care Research at Kent State University College of Podiatric Medicine.

MRSA infection reduction could also be attributed to better hygiene, sterilization, and cleaning techniques in the hospital setting and the community, adds Dr. Cole.

Dr. Williams also feels podiatrists approach amputations in a way that prevents future infection.

“We recognize that removal of a central ray will likely result in a transfer lesion and may subsequently become infected,” notes Dr. Williams. “Hence, we do not simply remove what is infected. We perform a functional amputation, which carries lower long-term risks.”

Dr. Cole adds that bone biopsies and deep tissue cultures are the foremost ways to isolate pathogenic bacteria and form the best treatment plan.

Currently, empiric antibiotic use should cover MSSA, says Dr. Williams, a Diplomate of the American Board of Foot and Ankle Surgery. Careful analysis for a history of MRSA, chronic ulcerations or a finding of liquefactive necrosis may lead one to redirect empiric therapy. She adds that one should choose empiric antibiotics based on the most likely organism(s) involved.

May 27, 2020
Volume 33 – Number 6 – June 2020
Pages: 10 – 11
By Jennifer Spector, DPM, FACFAS, Associate Editor
Resource Center
Podiatric Dermatology

Keys To Diagnosing And Treating Xerotic Skin Conditions

Given the common nature of xerotic skin disorders as well as the varied array of etiologies and treatments, these authors offer a thorough review of the literature on conditions ranging from ichthyosis and atopic dermatitis to venous stasis dermatitis and asteatotic dermatitis. 

Xerosis is a very common skin disorder characterized by excessively dry skin. Other terms for this disorder include xerosis cutis and xeroderma. Xerosis can be a primary pathology associated with loss of the normal water content of the epidermis. Xerotic skin can also occur secondary to associated skin disorders and systemic disease. Underlying all xerotic skin disorders is excess water loss from the epidermis.

Skin requires a water content of 10 to 15 percent to remain intact and maintain normal function.1 Three main deficiencies in the skin lead to the development of xerosis including deficiency in natural moisturizing factors; deficiency in the skin lipids or ceramides; and deficiency in moisture in the epidermis that is mediated by aquaporin water channels.2-7 Natural moisturizing factors are isolated to the stratum corneum in high concentration in the corneocytes. These factors consist of amino acids and their derivatives including lactate, urea and inorganic salts.2 Lipids in the stratum corneum modulate water loss. Deficiencies of these cutaneous lipids can increase epidermal water loss up to 75 times that of normal skin.8

Ceramides are the main lipids in the stratum corneum. Numerous risk factors contribute to loss of cutaneous lipids and predispose individuals to develop xerotic skin disorders. This may include decreased sebaceous and sweat gland activity associated with aging; anti-androgen therapy, which decreases sebum production; exposure to degreasing agents including soaps and solvents; and exposure to dry environments.

Xerosis has variable presentation depending on its severity. Mild xerosis can exhibit accentuation of skin lines and resemble the appearance of cracked porcelain due to epidermal water loss. Xerosis affects the normal desquamation process of the epidermis, leading to the development of thin flakes on the skin surface. With more severe xerosis, one will see pruritic, dry, cracked and fissured skin. Severe xerosis can produce an inflammatory dermatitis with localized erythema and edema. Clinicians may note xerotic skin on numerous areas of the body including the lower extremity, upper extremity, abdomen and face.

Patients of increased age are at significantly higher risk of developing xerotic skin disorders.9 Sebaceous gland activity decreases significantly after 70 years of age in women and 80 years of age in men.10 Sweat gland function also declines with age.11 Skin thickness decreases with age, leading to increased water loss from the skin to the environment.12 Environmental factors are also significant risk factors for the development of xerosis. In winter months when humidity decreases, xerosis occurs much more frequently. Xerotic skin disorders are more common in dry climates with low humidity.

Basic treatment for all xerotic skin disorders aims to minimize cutaneous water loss. Lazar and Lazar identified the following methods to prevent water loss and lubricate the skin:

• reduce the frequency of bathing, showering and skin cleansing;

• increase room humidity;

• limit exposure to soaps, detergents, solvents and water;

• avoid friction from washcloths, clothing and other abrasives; and

• use emollients frequently.13

Moisturizers are a mainstay in the treatment of xerotic skin. The skin contains natural moisturizers including ceramides, glycerol, urea and lactic acid. Many moisturizers contain these elements aiming to supplement these natural moisturizing agents. Skin care products that both improve skin hydration and improve barrier function are wise choices. Specific products should contain both rehydrating and lipid-restoring components. Urea has the largest body of evidence for the treatment of xerosis.14 Combining urea with moisturizing agents and ceramides can improve its effectiveness.

Aiming to address multiple key deficiencies in skin hydration, Weber and colleagues formulated a topical formulation containing glyceryl glucoside, natural moisturizing factors and ceramide, and found it to be an effective treatment modality for xerosis.15

Addressing Asteatotic Dermatitis And Ichthyosis In The Podiatric Patient 

Asteatotic dermatitis is an inflammatory dermatitis secondary to severely xerotic skin. Other terms for this disorder include xerotic dermatitis, xerotic eczema and eczema craquelé. Asteatotic dermatitis most commonly occurs in elderly people with underlying xerosis.

Asteatotic dermatitis can be generalized or localized. Generalized disease is often associated with underlying systemic disease. Localized forms most commonly occur on the pretibial areas. Patients with asteatotic dermatitis exhibit dry, cracked and polygonal fissured skin with scaling and pruritis. Secondary erythema, edema and excoriations can develop from scratching. Fissures with superficial bleeding can occur when the skin develops cracks deep enough to damage dermal capillaries.

Known as “winter itch,” asteatotic dermatitis most commonly occurs in the winter months when environmental humidity is the lowest. Asteatotic dermatitis is prevalent in the elderly due to decreased sebaceous and sweat gland activity associated with aging. Aside from climate and age, certain medications, including diuretics, retinoids and protein kinase inhibitors, can also contribute to the development of asteatotic dermatitis.16

In addition to the preventative skin care recommended by Lazar and Lazar, topical steroid ointments under occlusion and Unna boots are treatment options for asteatotic eczema.13,17 Topical calcineurin inhibitors, including pimecrolimus and tacrolimus cream, show efficacy in the treatment of asteatotic dermatitis.18 Recently, endogenous phospholipids, N-palmitoylethanolamine and N-acetylethanolamine, that are part of the endocannabinoid system have proven to be effective treatments for asteatotic dermatitis with efficacy superior to traditional emollients.19

Ichthyosis is a group of skin disorders characterized by excessive dry, scaling skin. The name for this disorder comes from the Greek word, ichthys, meaning fish, since this disorder is known for its xerotic scales. Both inherited and acquired forms of ichthyosis exist with the most common form being ichthyosis vulgaris, an inherited autosomal-dominant disorder that commonly begins in childhood.20 Patients with ichthyosis vulgaris have xerotic skin with fine white scales. Scaling is most common on the extensor surfaces of the extremities. Acquired ichthyosis typically occurs in adults and is associated with medications that inhibit sterol synthesis in epidermal cells (nicotinic acid) or underlying systemic diseases including Hodgkin’s lymphoma, leukemia, sarcoidosis, human immunodeficiency virus (HIV), hypothyroidism, hepatitis, malabsorption and bone marrow transplantation.21 Acquired ichthyosis appears as small white scales on the extremities.

Clinicians may treat ichthyosis with topical creams and emollients to hydrate the skin and keratolytics to remove scales.

Creams containing a high percentage of urea or lactic acid can be very effective treatment options for ichthyosis.22 Oral retinoids such as acitretin (Soriatane) and isotretinoin have a general anti-keratinizing effect, and the literature suggests effectiveness in the treatment of more severe cases of ichthyosis.20

What Are The Best Approaches For Atopic And Venous Stasis Dermatitis? 

Atopic dermatitis is an inflammatory skin disorder, which is often associated with xerotic skin. This disorder presents as dry, itchy, red, swollen and cracked skin. There is often serous drainage and the presentation can vary with age. A total body distribution is more typical in infancy. For children, it is more common to see atopic dermatitis in the back of the knees and the front of the elbows. The feet and hands are the most common sites in adults.

Frequently, atopic dermatitis is associated with allergies and asthma. Several factors are thought to contribute to the development of atopic dermatitis including genetics, immune system dysfunction, environmental triggers and disruption of skin permeability. Dry skin secondary to dry climate, frequent washing and harsh chemicals increases the risk of developing atopic dermatitis.23

Treatment of atopic dermatitis varies based on the severity of the disease. Basic treatment involves avoiding aggravating environments and keeping the skin moist with moisturizers and emollients.24 Mild to moderate disease may respond to topical corticosteroids.25 Oral corticosteroids and calcineurin inhibitors are applicable for the treatment of more severe and resistant cases.23,26-28

Venous stasis dermatitis is a common inflammatory disorder affecting the skin of the lower extremities. It is frequently one of the first manifestations of chronic venous insufficiency, when retrograde blood flow through incompetent valves leads to venous hypertension and the eventual extravasation of red blood cells and ferric iron into dermal tissues. Dermal tissue changes results both directly from venous hypertension and from an inflammatory process mediated by metalloproteinases that are upregulated by ferric iron in extravasated red blood cells.29

Stasis dermatitis appears as erythematous, scaling, eczematous patches on the lower extremity. The medial ankle is the most common site, owing to its relatively poor blood supply. Skin lesions can vary in distribution from small patches to areas encompassing the entire lower leg below the knee and involving the dorsal foot. Long-standing skin lesions can present with lichenification and hyperpigmentation. Additionally, chronic venous insufficiency and hypertension can lead to skin induration and progression to lipodermatosclerosis.30

The treatment of stasis dermatitis involves management of the underlying venous insufficiency and edema. One typically treats this condition through compression therapy.29 Xerotic skin in areas of quiescent dermatitis often responds to emollients and moisturizers. Mid-potency topical steroids are applicable for short durations in the management of acute inflammation and pruritus. Long-term and high-potency topical corticosteroids are not desirable as they can lead to steroid-induced cutaneous atrophy, which can increase the risk of developing venous skin ulcerations.31,32

While topical calcineurin inhibitors are only approved for the treatment of atopic dermatitis, they are reportedly effective treatment modalities for many inflammatory skin disorders including stasis dermatitis.33,34 Tacrolimus has specifically proven effective in the treatment of stasis dermatitis.35 Maroo and colleagues found a combination of topical tacrolimus and oral doxycycline to be effective for stasis dermatitis.36

What Is The Relationship Between Systemic Disease And Xerotic Skin? 

Several systemic diseases can cause xerosis and the workup of xerotic skin changes should include consideration of underlying systemic disease. Disorders including diabetes mellitus, thyroid disease and severe renal disease are frequently associated with xerotic skin. Treatment of xerosis secondary to systemic disease typically involves management of the underlying disease state as well as symptomatic management.

It is common to observe xerotic skin in patients with diabetes mellitus. Dry skin has the potential to fissure, increasing the risk of foot ulceration and infection in patients with diabetes mellitus.37,38

The nervous system plays an important role in maintaining adequate skin hydration. Diabetic polyneuropathy affects small sympathetic nerves, resulting in atrophy of sweat glands and decreased sudomotor response.39-42

Additionally, microcirculatory disease in patients with diabetes can lead to dry, rough, atrophic skin. Namgoong and team specifically examined the effect of peripheral neuropathy and microangiopathy on skin hydration in the feet of patients with diabetes mellitus.43 These researchers found a significant correlation between skin hydration and microvascularity, but no significant correlation between skin hydration and peripheral nerve function.

Hypothyroidism is a disorder of the endocrine system in which the thyroid gland fails to produce adequate amounts of thyroid hormone. Thyroid dysfunction is more common in women and people over the age of 60. This underproduction of thyroid hormones decreases the activity of the sweat glands, resulting in dry, xerotic skin.44 Skin changes in hypothyroidism include coarse, thin, scaly skin.45 The prevailing theory is that reduction of thyroid hormone alters sterol synthesis in epidermal keratinocytes, leading to xerotic skin changes.46 Treatment of hypothyroid-associated skin changes involves treatment of the underlying endocrine disorder with thyroid hormone supplementation.

Skin disorders are also extremely common in patients with chronic renal failure (CRF) and end-stage renal disease (ESRD).47 Xerosis is the most common skin disorder associated with renal disease, reportedly occurring in over 80 percent of patients with chronic renal failure.48 When it comes to the development of xerosis in chronic renal failure and ESRD, researchers have proposed several etiologies including decreased sweat production, decreased sebum production, reduced lipids in the skin surface, altered vitamin A metabolism, loss of or reduction in epidermal water content, and disruption of the integrity of the stratum corneum.49,50

In chronic renal failure and ESRD, reduced glomerular filtration rate leads to accumulation of waste products, including urea, creatinine, sodium, calcium, and phosphate, that are some of the main agents associated with the pathogenesis of skin disease in severe renal disease.51 Patients with severe xerosis secondary to renal disease can develop ichthyosis. Moisturizers with 5-10% urea cream or 2-3% salicylic acid are options for the treatment of uremic xerosis.49,52

In Conclusion 

Xerotic skin disorders are very common and have numerous etiologies including local and systemic disease. Both age and environmental factors play significant roles in the development of these disorders. Management of xerotic skin varies based on severity and pathology, and frequently involves management of environmental risk factors, emollients and moisturizers, and treatment of underlying disease states.

Dr. Hoffman is an Attending Physician in the Department of Orthopedics at Denver Health Medical Center. She is an Assistant Professor in the Department of Orthopedics at the University of Colorado School of Medicine. She is an Attending Physician for the Highland/Presbyterian St. Luke’s Medical Center Residency Program. 

Dr. Jerabek is an Attending Physician in the Department of Orthopedics at Denver Health Medical Center. She is an Assistant Professor in the Department of Orthopedics at the University of Colorado School of Medicine. 

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April 03, 2020
Pages: 36 – 41
By Kristine Hoffman DPM, FACFAS and Morgan Jerabek, DPM
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