Soreness in the arm is a common clinical symptom. The muscles are elastic and have blood circulation, and prolonged lack of blood and oxygen will lead to soreness. The clinical manifestation of arm pain after waking up in the morning is caused by two reasons: firstly, the patient presses his arm at night while sleeping, and the prolonged pressure will lead to arm pain, and since the patient is sleeping, he does not turn over in time, and the painful symptoms arise. The second is cold. If the quilt is not covered at night, the muscles of the arm contract and stiffen due to the blowing wind will also cause similar pain, and the patient will be relieved by applying heat to the symptoms, which will not last too long.