Itchy scalp with dandruff and hair loss may be a case of seborrheic dermatitis accompanied by hair loss. Because seborrheic dermatitis develops over a long period of time, it may lead to some damage to the hair, resulting in different degrees of hair loss. For this condition, seborrheic dermatitis is usually treated aggressively with oral antihistamines, such as the second-generation antihistamine levocetirizine hydrochloride. You can also use topical medication to stop itching, you can use Hassinaide solution, and locally you can also use ketoconazole shampoo to wash your hair, generally 3-4 days to wash 1 time, this can effectively control the inflammation, inflammation control after the hair loss will naturally have some relief.