What causes scalp itching and hair loss?

Scalp itching and hair loss may be caused by seborrheic dermatitis. At present, the etiology is not clear. Some studies think that it is related to seborrheic overflow, abnormal neurotransmitters, pityrosporum ovale, vitamin deficiency of B group, long-term alcoholism, mental tension and other factors. Glucocorticoids, antibiotics, selenium sulfide lotion and other drugs can be used locally according to doctor's advice.