Stubborn dandruff itchy scalp may be caused by ringworm of the head, seborrheic dermatitis, psoriasis and other diseases, patients can improve the condition through general treatment, medication and other ways. 1. Tinea capitis: patients should pay attention to keep the head clean, avoid scratching the scalp with hands, and prohibit sharing towels, combs, hats and other items with others. Patients can take antifungal drugs under the guidance of the doctor, such as itraconazole, terbinafine, etc., can also be used locally topical clotrimazole, terbinafine, amorphophallus, etc. for auxiliary treatment. 2. Seborrheic dermatitis: patients should maintain a regular life, get enough sleep, limit the fat and sugar diet, avoid drinking alcohol and spicy stimulating food. You can use shampoo containing tar, zinc pyrithione, selenium or ketoconazole and other ingredients to wash your hair under the guidance of a doctor, or use tacrolimus cream to apply locally, or take itraconazole and other treatments. 3. Psoriasis: psoriasis caused by stubborn dandruff itchy scalp patients can take methotrexate, cyclosporine, avidin, etc. under the guidance of the doctor, the patient can also be used locally carbotriol, tazarotene, tacrolimus, anthracene ointment, etc. for adjuvant treatment, in order to alleviate the symptoms. It is recommended that patients strictly follow the doctor’s instructions for medication, do not change the dose of drugs without authorization or abuse drugs privately, pay attention to monitoring the condition in life, and consult the doctor in time if there is any abnormality.