Tinea capitis is an infection of the scalp by mold-like fungi called dermatophytes.

Tinea capitis (also called ringworm of the scalp) is a skin disorder that usually affects only children. It can be persistent and contagious, however, it often disappears spontaneously at puberty.

The fungi that cause tinea infections thrive in warm, moist areas. You have an increased risk for tinea infection if you have poor hygiene, prolonged wetness of the skin (such as from sweating), and minor skin or scalp injuries.

Tinea infections are contagious. You can catch it if you come into direct contact with someone who has the condition, or if you touch contaminated items such as combs, hats, clothing, or similar surfaces. The infection can also be spread by pets, particularly cats.

Symptoms include round, scaly lesions on the scalp. These areas may be red or swollen (inflammed). The patient may have areas that appear bald, due to hair that has broken off. There may be small black dots on the scalp.

Itching of the scalp may be slight, or may not occur at all. Sometimes, there may be pus-filled lesions on the scalp (kerions).

The diagnosis is suspected primarily based on the appearance of the scalp. A skin lesion biopsy with microscopic examination or culture may show dermatophytes. This test is often not necessary to diagnose tinea capitis. A Wood's lamp test may be performed to confirm the presence of a fungal scalp infection.