Scab-like dandruff on the scalp can be considered as ringworm of the scalp, seborrheic dermatitis, psoriasis and so on. Patients need to choose the appropriate treatment plan according to the specific condition and under the guidance of professional doctors. Overall, the treatment includes oral medication, topical medication and so on. 1. Ringworm of the head: This kind of disease is usually caused by fungal infection. Before treatment, it is necessary to check the fungus, and if the fungus test is positive, then it can be considered as head rash. Patients can take oral itraconazole capsule antifungal drugs, or use topical terbinafine hydrochloride gel, naftifine ketoconazole gel, ketoconazole lotion for local treatment. 2. Seborrheic dermatitis: this disease is usually associated with heredity, microbial infections (Malassezia infection, etc.), high sebum secretion, immune dysfunction, etc.; often manifests yellowish-red plaques, accompanied by oily scales, itching and other symptoms. Patients can take antihistamine drugs such as cetirizine or antifungal drugs such as itraconazole orally; topical glucocorticosteroids (hydrocortisone, etc.) or calcium-modulated phosphatase inhibitors (e.g., tacrolimus, etc.) can also be used for local treatment. 3. Psoriasis: the cause of this disease is not clear, may be related to genetic, immune and other factors, patients can use immunosuppressants (methotrexate, etc.), biological agents (such as Enasip) and so on to carry out the treatment; can also be used externally with mometasone furoate cream and other glucocorticoid ointment, or calcium-modulated neural phosphatase inhibitor (tacrolimus ointment, etc.) for local treatment. It is recommended that patients go to the dermatology department of regular hospitals for relevant examinations to clarify the cause of the disease and receive treatment as prescribed by the doctor.