Seborrheic dermatitis is fungal infection?

Seborrheic dermatitis is not necessarily caused by fungal infection in clinical practice. This disease is mainly caused by scalp. Due to the large secretion of sebum, it is secreted on the skin surface, which may stimulate local pityrosporum ovale to form a certain excitation reaction and eventually form a certain inflammation. At this time, it may cause obvious flushing patches on local skin, and may produce certain itching symptoms. If the inflammation occurs on the face or under the arms, chest and back, it may also produce some chaff scale on top of these red patches. If it occurs on the scalp, it may produce a lot of sebum and a lot of dandruff, which is normal scale. The patient is also accompanied by obvious itching.