There are two primary classes of alopecia: Non-scarring and scarring. “With non-scarring alopecia, the hair follicle has briefly shut down manufacturing, however the ‘machine’ continues to be working,” says Luis Garza, M.D., Ph.D., a dermatology professor at Johns Hopkins College of Drugs in Baltimore, MD. In such instances, hair progress can recuperate over time and with some coaxing. However with scarring alopecia, the physique’s hair-making machine has been destroyed, so hair loss is irreversible. Luckily, the most typical sorts of alopecia are non-scarring, together with androgenetic alopecia (male- and female-pattern baldness), alopecia areata (autoimmune-related hair loss), and telogen effluviam (stress-induced hair shedding).