What is the term for abnormal hair loss?

The term "alopecia" refers to abnormal hair loss in general. It encompasses various types and patterns of hair loss, including conditions like alopecia areata, which is a specific form of hair loss characterized by patchy baldness. The broader term alopecia covers all forms of hair loss, whether it is due to genetic factors, medical conditions, or environmental factors.

While "alopecia areata" is a specific subtype of alopecia and describes localized hair loss, it does not capture the entire spectrum of hair loss conditions. Terms like allergy and hair shedding do not pertain to abnormal hair loss as directly as alopecia does. Allergy refers to an immune system reaction, and hair shedding can be a normal part of the hair growth cycle rather than an indication of abnormal loss. Therefore, understanding that alopecia encompasses all types of abnormal hair loss is essential in hair care and dermatological discussions.