Excessive dandruff is also a skin disease, and this condition is most commonly known as seborrheic dermatitis. The treatment of seborrheic dermatitis is as follows: firstly, you can choose to take oral antihistamine drugs with B vitamin treatment; secondly, you can choose ketoconazole lotion to wash your hair, which can effectively relieve excessive dandruff or skin inflammation. In addition, there are other possible causes of excessive dandruff, such as psoriasis of the scalp area. In addition to excessive scalp, this disease mainly appears as infiltrated well-defined plaques, and sometimes pestilization can be seen. It may also be dermatophytosis due to fungal infection, which may be accompanied by more pronounced itching, combined with incomplete keratinization and hyperkeratosis, and increased dandruff may also occur after scratching.