A large patch resembling ringworm on the buttocks

The buttocks refer to the gluteal region. A large patch resembling tinea (ringworm) on the buttocks may be caused by conditions such as keratosis pilaris, eczema, or tinea cruris, and timely medical treatment at a hospital is necessary. Specific causes are as follows:

1. Keratosis Pilaris

This condition may be related to genetic factors, metabolic disorders, or vitamin A deficiency. It can cause certain skin damage and lead to the appearance of spots. Treatment may include topical application of tretinoin cream, salicylic acid ointment, or urea ointment under a doctor's guidance.

2. Eczema

Eczema is usually an inflammatory condition affecting the superficial layers of the epidermis and dermis, triggered by various factors. When it occurs on the external genitalia, anus, or inner thighs, it may cause severe local itching. Medications such as desonide cream or tacrolimus ointment can be used according to medical advice.

3. Tinea Cruris (Jock Itch)

Tinea cruris refers to a fungal infection of the superficial skin in areas such as the groin, perineum, anus, and buttocks. It often causes itching. Prolonged scratching may lead to localized eczematous changes and lesion appearances similar to tinea. Treatment may include antifungal medications such as compound clotrimazole cream or bifonazole solution, as directed by a physician.

In addition to the above-mentioned causes, similar symptoms may also result from other conditions such as tinea corporis, lichen simplex chronicus, or psoriasis. Avoid scratching with hands and maintain cleanliness in the affected area.