What about pityriasis scalp?

Pityriasis scalp is a skin disease caused by Malassezia. Malassezia proliferation on the scalp causes excessive cell proliferation of the scalp cuticle, resulting in increased dandruff, thickening and other symptoms. Its clinical symptoms are mainly greasy scalp and hair with increased white scales. Gray-white bran scales of different sizes can be seen on the scalp, which are difficult to scrape out and often accompanied by itching. Treatment should first eat less spicy greasy and other irritant food, eat more fruits and vegetables, keep regular schedule, stay up late. External drugs can choose coal tar lotion such as zekang lotion or selenium disulfide lotion, can also use compound ketoconazole shampoo. Oral drugs can take compound vitamin B.