General weakness without appetite may be caused by mental and psychological factors, hypoglycemia, anemia, etc., need to be targeted to take the adjustment of eating habits and emotions, such as general treatment, ferrous succinate and other drug therapy. 1. mental psychological factors: may be due to mental anxiety, depression, psychological stress, inhibit the sympathetic nerves, thus feeling general weakness, and will have an impact on appetite, pay attention to adjust the mental psychology, relax the pressure. 2. Hypoglycemia: when the heart oxygen consumption increases when hypoglycemia can easily lead to weakness, palpitations, poor mental health and other symptoms, hunger, but there are also some people in low blood sugar may feel loss of appetite, should eat in a timely manner to replenish energy, such as drinking sugar-sweetened beverages or eating sugar cubes. 3. Anemia: As the peripheral blood erythrocyte capacity of the human body decreases and falls below the normal range, the red blood cells are not able to supply oxygen to other tissues and organs of the body, and there will be symptoms such as fatigue, dizziness, loss of appetite, etc. Mostly due to iron-deficiency anemia, which usually requires iron supplementation, such as ferrous lactate and ferrous succinate. No appetite, generalized weakness may also be caused by other reasons, if the symptoms do not improve significantly, you should consult a doctor to find out the cause.