Dandruff may be particularly severe for physiological reasons, or pathological reasons such as ringworm, seborrheic dermatitis, psoriasis, etc. According to the cause of the disease, you can choose to improve the symptoms of general treatment, medication and other ways to improve the symptoms. 1. Physiological reasons: especially serious dandruff may be physiological reasons, usually appear within a few days after washing hair, this is a normal phenomenon, just need to regularly wash the scalp can be, it is recommended to use lukewarm water to wash hair, you can also use some shampoo products with anti-dandruff function. 2. Pathological causes (1) Tinea capitis: dandruff is particularly serious may be tinea capitis, can use sulfur soap or ketoconazole shampoo shampoo, oral antifungal drugs, such as ashwagandha, itraconazole, terbinafine and so on. (2) seborrheic dermatitis: dandruff is particularly serious and may be seborrheic dermatitis. Topical glucocorticoid preparations, such as hydrocortisone cream, dexamethasone cream, etc.; with fungal infections (such as Malassezia, etc.), you can use antifungal drugs, such as ketoconazole, econazole, etc.; accompanied by itching, you can take antihistamines, such as loratadine, cetirizine and so on. (3) psoriasis: dandruff is particularly serious and may be psoriasis, psoriasis patients can use local glucocorticoids, such as hydrocortisone cream, dexamethasone cream, etc., can also be used externally vitamin D3 analogues (such as carbotriol, etc.), calcium-modulated neural phosphatase inhibitors (such as tacrolimus, pimecrolimus, etc.), and if necessary, can also be phototherapy. Dandruff is particularly serious, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor to carry out active treatment, do not take medication without authorization, to avoid adverse consequences.