At present, there is no specific clinical data on how many years seborrheic alopecia hair follicles will be necrotic, which is related to a variety of factors such as living habits, androgen secretion, and individual differences are large. 1. Lifestyle habits: if you often stay up late, tired, anxious, irregular diet, hair loss will progress relatively faster, and the hair follicles will atrophy and necrosis earlier. 2. Androgen secretion: seborrheic alopecia, also known as androgenic alopecia, increased dihydrotestosterone activity in the body, and the hair follicles combined, can cause shortening of the hair growth cycle, as well as hair thinning, softening, and ultimately, hair follicle atrophy necrosis. If androgen activity is significantly increased, the speed of follicular necrosis will be accelerated. Patients with seborrheic alopecia should consult a doctor in time to slow down hair loss and follicular necrosis through professional treatment.