The causes of hair loss in young women are the following: First, excessive shampooing, perming and ironing, resulting in damage to hair follicles and shrinkage of hair follicles. Second, excessive dieting caused by malnutrition, due to long-term unreasonable diet structure, resulting in hair loss. Third, mental factors, due to the increased pressure of work life, often stay up late, excessive mental tension, will lead to shorten the hair growth cycle, hair loss phenomenon. Fourth, hair loss caused by certain diseases or medication, diseases such as lupus erythematosus, hyperthyroidism, diabetes and so on. When the disease is cured, the hair will gradually grow out. Some chemotherapy drugs can make hair fall out, but once the drugs are stopped, the hair will grow back in a few months. Fifth, some ringworm can also destroy hair follicles and cause hair loss. Sixth, hair loss caused by genetic factors and elevated androgens. Regardless of the type of hair loss, the main thing is to treat the symptoms and you will usually regain your health.