Oily, itchy scalp with hair loss is a high probability of seborrheic dermatitis. Seborrheic dermatitis is sometimes associated with emotional stress and anxiety, high sebum secretion in the scalp, vitamin deficiency, and many other factors. As the sebum secretion of the scalp is high, it also leads to the growth of fungus, so it is recommended to supplement the vitamin B group and zinc preparations. At the same time, avoid eating spicy and irritating foods that can lead to a greasy scalp. Ketoconazole lotion or selenium disulfide lotion can be given for topical application twice a week, and the instructions need to be read carefully before use. You also need to pay attention to rest and not to stay up late. If accompanied by obvious itching, you can take oral antihistamines, such as loratadine, etc. If hair loss is severe, you can also take appropriate cystine tablets to help grow hair.