#alopecia areata
- Alopecia — The partial or total loss of hair from the scalp or other regions of the body, caused by genetic factors, endocrine imbalances, autoimmune diseases, systemic stress, or aggressive medical treatments. This structural pathological phenomenon affects the natural growth cycle of hair follicles, leading to their miniaturization or destruction, and is classified into cicatricial (irreversible) and non-cicatricial forms.