Black itchy thigh root of male

If a man's thigh root is black and itchy, it is most likely due to tinea cruris or fungal infection. Of course, this is not a serious illness, as long as you go to the hospital for timely treatment. Here is a reminder that if it is confirmed to be tinea cruris, it is best to do a thorough cleaning, especially for underwear, it is recommended to change to new ones to avoid cross infection.

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Most of the tinea cruris is caused by fungi such as Trichophyton rubrum, Trichophyton barbae and Epidermophyton floccosum. They mainly infect the superficial tissues of the human body, so they are also called superficial fungi. Their morphology can be divided into large conidia, microconidia and hyphae. The suitable growth temperature is 20℃～27℃. They can grow well in 1～2 weeks through culture. A few tinea fungi are not easy to be cultured artificially, such as Trichophyton versicolor and Rhinosporea. Generally, fungi are more tolerant to chemical reagents such as acid, alkali and ethanol than bacteria. Experimenters often use this point to kill the fungi in the skin and specimens before culturing fungi. Tinea cruris can be transmitted through sexual contact or other direct contact, such as sharing a bed or direct contact with infected animals such as dogs, cats, rabbits, etc.; it can also be transmitted through indirect contact with clothing or utensils that have been contaminated by the patient; it can also be caused by self-infection due to tinea cruris on the hands and feet; it can also be induced by long-term use of hormone drugs or diabetes and chronic wasting diseases.

This disease often occurs in summer and hot and humid areas. It affects more men than women.

Superficial fungi parasitize in the stratum corneum of the epidermis of humans or animals, and their metabolites act as toxins or allergens to cause dermatitis. Tinea cruris often occurs in the external genitalia, groin, perineum and around the anus. The damage is manifested by the appearance of small papules or blisters at the upper end of the inner thigh corresponding to the scrotum, which develop to the surrounding area to form a semi-circular lesion. The edges of the lesions are clear and raised. After the inflammation subsides, the lesions are reddish-brown with scaling. It is usually unilateral, but bilateral symmetrical distribution is also seen. Because this area is sweaty, moist, and prone to friction, the inflammatory reaction is generally more severe than tinea corporis. In men, tinea cruris is more severe on the left side, with a larger area of ​​skin damage, often accompanied by severe itching, sometimes affecting the scrotum and penis, and in severe cases spreading to the front, back and upper parts. In women, tinea cruris often affects the buttocks, pubic area, and even the lower abdomen and waist, forming large rashes.

According to the above symptoms and the fungal examination of the dandruff at the site of injury, a diagnosis can be made. It should be distinguished from psoriasis, pityriasis rosea, seborrheic dermatitis, etc. Treatment: Mainly with external medication. After washing the affected area, apply compound benzoic acid ointment, clotrimazole cream, 2% miconazole cream or 1% econazole cream twice a day for 2 to 4 weeks. Because the skin on the abdomen is tender, external irritating anti-tinea drugs should be avoided. For stubborn cases with extensive skin damage, severe inflammation, and poor treatment effect, oral griseofulvin tablets, 0.6 grams per day, for 2 to 4 weeks, or ketoconazole tablets, 0.2 grams per day, for 4 to 8 weeks can be considered.

Chinese medicine treatment can be externally applied with 5% sulfur ointment twice a day for 2 to 4 weeks. Tinea cruris refers to a skin disease caused by fungal infection of the inner thigh, perineum, and buttocks. The fungus of tinea cruris can be transmitted through underwear, bath towels, etc., and can also be transmitted through sexual intercourse, so tinea cruris is also included in sexually transmitted diseases. But we must not think that tinea cruris is definitely transmitted through sexual intercourse. Clinically, more than 80% of tinea cruris is transmitted through non-sexual intercourse.

The pathogens that cause ringworm in our country are mainly Trichophyton rubrum and Trichophyton gypseum of the genus Trichophyton, Epidermophyton floccosum of the genus Epidermophyton, and a few Candida albicans.

The main symptom is obvious local itching. This disease is prone to recurrence. It is mostly caused by contact with patients with ringworms or infection through cats, dogs, etc., or indirectly through clothing and utensils, or first suffering from ringworm of the foot and then spreading the infection due to scratching. In the summer, the climate is hot and humid, and the human body sweats a lot, especially in the thighs. If you don’t take a bath in time, or wear tight underwear, a lot of sweat has no time to evaporate, you are prone to this disease. In addition, patients with diabetes, excessive leucorrhea, etc., as well as long-term oral or topical use of large amounts of broad-spectrum antibiotics or corticosteroids are also prone to ringworm of the thighs. In terms of incidence, it is mainly young people, and there are more men than women. This disease often occurs in the summer, and the humid or hot climate often makes the condition worse, and it is relieved or cured in winter.

Tinea cruris is a skin disease that often occurs in the thighs. Sometimes it can also affect the perineum, mons pubis, perianal area, buttocks, scrotal folds, etc. It is severely itchy. Due to scratching, patients may develop secondary dermatitis, lichenification or secondary infection.