40-year-old women lose hair seriously may be genetic factors, malnutrition, mental stress, scalp diseases, etc., loose teeth may be periodontitis, bad dental habits, etc. caused. 1. Severe hair loss: if the parents and grandparents have hair loss phenomenon, there is a genetic predisposition, when nutritional deficiencies, will also affect hair growth caused by shedding; if prolonged mental tension, fear, etc. will affect the body’s metabolism, resulting in hair loss; if there is seborrheic dermatitis and other scalp diseases will also lose hair. 2. Loose teeth: when there are periodontal diseases or often grinding teeth and other bad habits, can cause loose teeth, it is recommended to timely visit the stomatology department for treatment, to develop good dental habits. It is recommended that patients go to the hospital for examination in time and do not take drugs blindly.