Do hair follicles die in genetic balding and alopecia areata?

I know DHT shrinks hairs on male pattern baldness but Does DHT destroy the follicle? And does alopecia areata destroy the follicle or just cause hair to fall out?

Hair that has genetic balding eventually die. It is called Apoptosis of the hair follicles and it is genetically coded to the number of hair cycles a hair may live. Alopecia areats is an autoimmune disease that also has a genetic propensity; however, if it it treated successfully with appropriate anti-inflammatory drugs, it can reverse and sometimes recur.