Softness and lack of strength in the body may be seen in physiological causes, but may also be related to colds, anemia, heatstroke, diabetes, chronic nephritis, liver disease, chronic wasting disease such as tuberculosis, tumors and other pathological causes. 1. Physiological causes: such as excessive fatigue after strenuous exercise, lack of sleep, inadequate rest and mental depression. Common colds, anemia, heat stroke, will also make the body in a state of disease, there is no strength in the body soft performance. 2. Pathological reasons: diabetic patients may have too high or too low blood sugar, chronic nephritis and liver disease can easily lead to the body’s water-electrolyte imbalance and osmotic pressure imbalance, etc., there may be soft and weak performance; chronic consumptive diseases, such as tuberculosis, tumors, etc., usually may have soft and weak feeling. If the weakness is not relieved after sufficient rest, it is recommended to consult a doctor in time to clarify the cause of the disease and treat the cause in time.