The pain and lack of energy and weakness may be caused by over-activity, which is usually nothing to worry too much and can be recovered by rest. It may also be caused by pathological factors such as cold, osteoporosis, rheumatoid arthritis. In this case, it is necessary to identify the cause and actively treat the disease to avoid deterioration. Physiological factors: physiological fatigue due to strenuous exercise, excessive physical labor and other reasons, lactic acid buildup causes body pain and weakness, usually after appropriate rest can recover, usually should pay attention to the degree of exercise to avoid causing discomfort. Second, the pathological factors: 1, cold: mainly due to the cold, the body produces inflammatory reaction, due to the emergence of infection and damage to muscle tissue, cells, etc., and then the phenomenon of body pain without strength and weakness, usually when there is pain and other systemic symptoms, indicating that the cold situation is more serious; 2, osteoporosis: is due to age, metabolism and bad habits and other factors caused by the reduction of bone mass and bone tissue structure destruction, so that the metabolic bone brittle increase. The metabolic bone disease that increases bone fragility. The main manifestations are pain, muscle weakness and other symptoms, usually aggravated after weight bearing or exertion. At the same time, osteoporosis patients due to increased bone fragility, easy to cause fractures, causing pain; 3, rheumatoid arthritis: the pathogenesis is not completely clear, may be related to autoimmunity, infection, genetics, bad habits and other factors, mainly symmetric erosion of the joint, changing the structure and physiological function of the synovial membrane, resulting in joint deformity, dysfunction, etc., mainly manifested as pain, joint swelling, fever The main manifestations are pain, joint swelling, fever, etc. It may also cause body pain and weakness.