The common causes of soreness and distension in the extremities are as follows: First, daily work or excessive exercise leads to injury and strain in the muscles of the extremities, and the accumulation of metabolic products stimulates soreness and distension. Second, it can be seen in cervical spondylosis, especially spinal cord cervical spondylosis will lead to soreness, uncomfortable, weakness of the limbs, and in serious cases, it will lead to unstable standing and walking with a sense of stepping on cotton. Third, it can be seen in the internal environment changes, such as low potassium, low calcium, due to ion disorders resulting in abnormal muscle function, will also appear limb soreness. Systemic diseases can also cause soreness in the limbs, such as fever, especially low fever, will stimulate the muscles of the limbs to produce the corresponding soreness, it is recommended to go to the hospital for detailed examination and take appropriate treatment after a clear diagnosis.