Normal body wasting usually does not have any harm, if it is caused by pathological factors, body wasting may produce certain harm. For example, endocrine abnormalities, lack of trace elements, decreased resistance, sagging internal organs, and unbalanced body proportion. 1. A woman’s body is too thin and her body fat percentage is too low, which may have an effect on the endocrine system, resulting in failure to ovulate and amenorrhea. 2. Too thin body caused by long-term partiality, picky eating and anorexia may cause lack of microelements, which may easily lead to hair loss. 3. Being too thin may lead to a decline in one’s immunity, which is easily stimulated by external infections and may increase the chance of illness. 4. Patients who are too thin have less abdominal fat and weak abdominal muscles, and some of them are prone to visceral prolapse. 5. People who are too thin may have unbalanced body proportions, which may affect the overall aesthetics of the individual. Excessive thinness leads to less energy storage in the body, and after a lot of exercise, they are prone to symptoms such as limb fatigue, lack of physical strength and weakness. Some people may also suffer from osteoporosis and anemia. One should maintain a healthy body weight and avoid blindly pursuing an excessively thin body type.