Dandruff becomes more after perming hair may be the occurrence of contact dermatitis, ringworm, psoriasis and other diseases, you can improve the symptoms by stopping perming hair and medication. 1. contact dermatitis: scalp contact with chemical stimulation may cause dermatitis, it is recommended to stop using the relevant chemical substances, can be used locally glycerine lotion, dexamethasone cream to ease the discomfort and improve the symptoms, if necessary, oral loratadine and other medication. 2. Tinea capitis: If an infection occurs after perming the hair, it may cause tinea capitis, resulting in an increase in dandruff, etc. You can use ketoconazole ointment or oral itraconazole and other drugs to improve the symptoms. 3. psoriasis: psoriasis patients may also appear after perm hair a large number of dandruff, can be used locally Vitamin A acid cream or oral cyclosporine, methotrexate and other drugs. Due to the individual differences and the diversity of causes, the drug needs to be used strictly in accordance with the doctor’s instructions, and should be promptly consulted after the emergence of adverse reactions, in accordance with the doctor’s instructions for treatment.