Tinea pedis

Introduction Athlete's foot refers to a fungal infection of the skin between the soles of the feet and the toes. It has the same global distribution in the tropical and subtropical regions as the body sputum. The city has a higher incidence rate than the rural areas. In some occupations such as sanitation workers and soldiers who wear long-wearing rubber shoes for a long time, the incidence rate is as high as 80%. In addition, the high incidence of athlete's foot is also related to the anatomical features of the foot. The sweat glands in the foot are rich, and the sebaceous glands make the skin surface alkaline, which is beneficial to the growth of fungi. The thick cuticle of the foot is also a fungus. The growth provides a rich nutrient. In addition, some fungi can form special structures called joints in the dander, which can survive for a long time in the natural environment and have infectious disease-causing ability.

Cause

The cause of the disease is due to the invasion of the toe by fresh epidermis, Trichophyton or Toenococcus. Red T. rubrum is highly resistant and difficult to control. It does not scatter, resulting in dry and moist skin. Athlete's foot is thick in the horny layer, lack of sebum, rich in sweat glands, more sweating, and wet feet. It is good for mold growth and reproduction. It is easy to infect each other when using public baths, public slippers, foot basins and towels.

an examination

Related inspection

Fungal examination of skin lesions

Clinical manifestations of athlete's foot

(1) blistering: occurs mostly in the summer, the symptoms are the size of the rice grains between the toes, the feet, and the soles of the feet, deep in the blister, scattered or clustered, the walls are thick, the content is clear, not easy to rupture. After a few days, dry desquamation, mutual fusion to form a multi-atrial blister, tear off the wall, visible honeycomb base and bright red erosion surface, severe itching.

(2) erosive: manifested as partial epidermal stratum corneum dip and whitish. As the skin is rubbed off during walking, the bright red smashed surface is exposed. In severe cases, the skin between the toe, the toe and the foot can be involved, and the itching is severe. It occurs frequently between the toes of 3.4.5. Common in sweating people.

(3) scaly keratosis type: Symptoms are thickening, roughness, desquamation of the toes of the soles of the feet, feet, and heels. The scales are flaky or small, and repeatedly fall off. There is a crack in the skin between the toes in the winter, and blistering occurs in the summer, which is painful. Often due to scratching caused by secondary infections, accompanied by pustular sore, lymphangitis, lymphadenitis, cellulitis, erysipelas, sepsis and other diseases.

Differential diagnosis

Clinically, due to differences in rash performance, the athlete's foot can be traditionally divided into the following three types:

(1) Impregnated erosive type: occurs between the toes, especially the 3-4 and 4-5 toes, because these toes are close to each other, creating a warm lake wet for the toes skin. The environment of growth and reproduction is characterized by the thickening of the stratum corneum due to the parasites of the fungus. The excessively thickened stratum corneum is impregnated with white and soft due to moisture, scraping off the macerated rot, revealing the bright red smashed surface, with a small amount Exudate, itching is obvious, often due to itching and secondary bacterial infection, and lymphangitis, erysipelas and so on.

(2) blister type: occurs in the foot and foot, the rash is the diameter.

(3) scaly keratinization type: this type occurs in the ankle, heel and foot side, often bilateral, especially in winter, local skin hyperkeratosis, subject to weight and cleft palate, severe pain Normal walking is generally no itching.

The above classifications and observations in actual work are not very obvious, and different performances may alternate and may coexist at the same time.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.