Usually, the following diseases can lead to limb pain: First, excessive exercise or overexertion can lead to the production of large amounts of lactic acid in the muscles, and patients will show clinical symptoms such as limb pain and weakness. Second, persistent high fever, such as bronchopneumonia or septic infection, bacteria into the blood circulation induced immune response, can lead to persistent high fever symptoms, may also cause the limbs and other muscle tissue metabolic level changes, manifested as limb pain symptoms, accompanied by headache, dizziness and other clinical manifestations. Third, anemia, including traumatic blood loss or iron deficiency anemia, may also cause clinical symptoms such as soreness and weakness in the limbs, and may also be accompanied by clinical symptoms such as generalized chest tightness, panic, and pale skin.