Alopecia areata generally occurs only on the scalp with patchy hair loss, usually mild, affecting just a few patches.

Total alopecia is an extension of alopecia areata, where hair loss progresses to complete baldness.

Universal alopecia is more severe, involving not only complete hair loss on the scalp but also potential loss of eyebrows, armpit hair, pubic hair, and even all body hair.

These three conditions represent a progressive worsening, with alopecia areata being the mildest and universal alopecia being the most severe. The treatment plans for these conditions are roughly the same, but the duration varies; long-term persistence is necessary, along with proper medication from a dermatology department in a reputable hospital.