A lot of dandruff on the scalp may be caused by physiological reasons, such as improper scalp washing and care, etc.; it may also be caused by pathological reasons, which are commonly found in seborrheic dermatitis, head psoriasis, ringworm and other diseases.
1. Physiological reasons: If patients use inappropriate washing and care products, such as alkaline shampoo products, excessive washing, etc., resulting in dry scalp, dandruff increase. Alkaline washing products may cause irritation and damage to the scalp, leading to increased dandruff.
2. Pathologic causes:
(1) Seborrheic dermatitis: seborrheic dermatitis is prone to occur in seborrheic overflow areas, and is a common chronic inflammatory skin disease with an unknown etiology, which may be related to genetic, dietary, and Malassezia infections. If it occurs on the head, it may lead to localized erythema, covered with greasy scales and so on.
(2) Head psoriasis: the cause of the disease is not known, and may be related to genetic, immune and other factors. Scalp psoriasis can occur in the scalp area, mainly manifested as erythema on the scalp, itching, scratching may lead to increased dandruff, scalp breakage.
(3) Tinea capitis: Tinea capitis is an inflammatory disease caused by fungal infection, which leads to localized erythema, pimples, desquamation, baldness, itching, etc. on the scalp, making dandruff increase.
In summary, the causes of increased dandruff are more, it is recommended to pay attention to scalp care, avoid scratching and stimulation, induced infection, and timely visit the regular hospital dermatology department to clarify the cause.