Scarring - (Loss of hair follicles). Cutaneous lupus erythematosus and fungal kerions are the most prevalent forms of scarring alopecia, which causes permanent hair loss.
 
Nonscarring - (The hair follicles are still present). Alopeaia areata is this type, which is an autoimmune process but the cause is unknown. Since the hair follicles still exist, it is often reversible. It However, it can develop into the scarring type.