In daily life, if a patient has arm pain when it rains, it may occur because the patient’s arm has been cold for a long time due to the lowering of the temperature after the rain, which affects the normal flow of Qi and blood in the arm, resulting in Qi stagnation and blood stasis, and obstruction of the meridians, and the patient will have pain. In addition, if the patient suffers from fasciitis, localized bursitis, or elbow joint syndrome in the arm, it can cause arm pain after catching a cold, and some may be accompanied by localized swelling, loss of skin sensation, and impaired finger dexterity. In addition, if the patient’s arm is traumatized and old muscle damage occurs, it can also cause soreness after catching a cold. Therefore, when this clinical manifestation occurs, the patient should pay attention to the warmth of the arm area, and should be given hot compresses, or physiotherapy apparatus baking electricity and other treatments to relieve the soreness.