Hair loss is mainly related to endocrine disorders, autoimmune diseases or scalp diseases. 1. Endocrine disorders: when there are diabetes, hyperthyroidism, hypothyroidism and other diseases, there will be the phenomenon of hair loss; often stay up late, tired people can also cause endocrine disorders and hair loss. 2. Autoimmune diseases: for patients with lupus erythematosus, lichen planus, scleroderma, etc., it is easy to have scarring hair loss. It can also lead to hair loss. 3. Scalp diseases: when the scalp suffers from ringworm, folliculitis, seborrheic dermatitis, it is easy to damage the hair follicles and lead to hair loss, and if not treated in time, it will eventually cause a lot of hair loss. It is recommended that people with hair loss go to the dermatology or endocrinology department of the hospital for further examination and treatment, and usually adjust their work and rest habits to ensure sufficient sleep.