There are several reasons for not wanting to eat and weakness: First, it is common to have malnutrition, poor health, no appetite and no desire to eat, forming a vicious circle. Second, anemia, such as iron deficiency anemia, marine anemia, the body has problems transporting nutrients, so the body is weak. Third, hypothyroidism, because the thyroid gland is an important endocrine hormone, and the body’s energy metabolism has an important relationship, lower thyroid function leads to low metabolism of the body, low body temperature and weakness of the body. Fourth, cold and fever can also lead to weakness of the body. Common symptoms of cold are weakness and loss of appetite. Fifth, anxiety, depression, can also appear physical discomfort, weakness, do not want to move, the body weakness, it is recommended that the hospital examination to identify the cause of the disease.