Alopecia (alopecia) - abnormal hair loss on the head, face, rarely - on the trunk and extremities. There are cicatricial and non-scarring alopecia. Scar alopecia occurs due to the destruction of hair follicles due to inflammation, atrophy or scarring in case of lupus erythematosus, pseudoplella, and Little-Lassuire syndrome. Follicular mucinosis.