Seborrheic dermatitis with a lot of dandruff can be treated by general treatment, topical medication (such as ketoconazole shampoo), oral medication (such as itraconazole), etc., to alleviate the symptoms of increased dandruff. 1. General treatment: patients should maintain a regular routine, ensure adequate sleep, eat less greasy, sugary foods, and avoid over-cleaning the scalp. 2. Topical drugs: adult seborrheic dermatitis can use ketoconazole shampoo to clean the scalp under the guidance of a physician; you can also apply ketoconazole cream locally; you can also use tacrolimus cream, dexamethasone ointment and other drugs under the guidance of a physician. 3. Oral medication: when the condition is serious, you can take oral antifungal drugs under the guidance of a doctor for treatment, commonly used drugs have itraconazole, and concurrent bacterial infections, you can use tetracycline erythromycin and other drugs. Seborrheic dermatitis caused by dandruff increase, it is recommended to go to the hospital, under the guidance of the doctor for treatment, strictly comply with the doctor’s prescription medication.