Patchy baldness white hairs usually turn black in about two to three months.
Generally speaking, spot baldness can be cured after about 3~6 months, and the process of curing is that small white hairs grow out first, and the white hairs gradually become black and hard, and the time from the white hairs to the white hairs becoming black is generally about 3~6 months.
Patch baldness is caused by genetic factors, immune factors, mental factors or local infections and other factors, manifested as flaky scalp hair loss, local hair follicles at the same time into the resting phase, in the beginning of the hair, at first white hairs grow, soft texture, after 3~6 months of time before slowly hardening.
When baldness occurs, you need to go to the dermatology department of the hospital in time to find the cause of baldness, use the appropriate medication, and at the same time pay attention to rest to promote the recovery of baldness.