The specific causes of female baldness and hair loss are not yet clear, and it is considered to be related to heredity, immune function disorders, mental and psychological factors, and underlying diseases that affect immunity. 1. Heredity: according to relevant research, about 25% of baldness has family history, considering that this disease has a direct relationship with family inheritance. 2. Immune dysfunction: under the influence of certain factors, T-lymphocytes in the immune system are dysfunctional and cannot recognize normal cells, which may produce immune reactions and lead to patchy hair loss. 3. Mental and psychological factors: long-term adverse emotions, such as anxiety, depression and frustration, may cause mental stress, inducing or aggravating the condition of patchy baldness. 4. Underlying diseases affecting immunity: atopic dermatitis, vitiligo, dry syndrome, diabetes mellitus, etc., may also cause patchy baldness. Long-term use of certain drugs, vaccination, viral infections, etc., causing immune function disorders, may induce pemphigus vulgaris. Patchy baldness is a sudden onset of limited, patchy hair loss, and is considered to be related to a variety of factors. It is recommended not to blindly use drugs, you can go to the hospital dermatology department, combined with the doctor’s advice to regulate.