A patch resembling ringworm has appeared on the leg, but it is neither painful nor itchy.

Generally, a patch resembling ringworm appearing on the leg without pain or itching may be caused by factors such as sweat irritation, eczema, or psoriasis. Treatments vary depending on the underlying cause. A detailed analysis is as follows:

1. Sweat Irritation

A round red patch appearing on the thigh without pain or itchiness is primarily due to excessive sweating in a damp environment, especially when sweat is not promptly removed. In such cases, it is recommended to change and wash clothes regularly, maintain skin cleanliness, and avoid wearing wet clothing.

2. Eczema

Eczema is a common skin condition that can cause symptoms such as redness and itching, and sometimes lesions resembling ringworm. Treatment usually involves applying medications like dexamethasone cream or danpirun ointment as directed by a physician, which helps alleviate discomfort.

3. Psoriasis

Psoriasis is a chronic skin disease characterized by red patches and scaling, which may sometimes appear similar to fungal infections. It is advisable to visit a dermatology department for specimen testing. Avoid scratching the affected area and maintain local hygiene. Once the exact cause is identified, appropriate symptomatic treatment should be administered.

In addition, other skin conditions such as urticaria and dermatitis may also lead to similar symptoms. If the skin lesion is severe or accompanied by other symptoms, prompt medical consultation is recommended for accurate diagnosis and proper treatment. Also, avoid using chemical-containing cleansers or detergents that could irritate or damage the skin.