Clinical numbness in the left arm is a common condition that can have a number of causes. First, it occurs when the patient experiences overexertion, strain, or cold in the left arm, resulting in poor local blood flow, stagnation of Qi and blood stasis, and local soft tissue injury. If this is the case, local braking can be considered in the treatment to avoid strain, strain, and cold. Local acupuncture, moxibustion or acupuncture point herbal iontophoresis, physiotherapy instrument baking electricity and other treatments can be given. It can also be combined with oral medication, which can be taken orally to activate blood circulation and remove blood stasis. At the same time, Chinese medicine techniques should be used to massage the local area. After these treatments, the symptoms will be gradually relieved in about 1-2 weeks. In another case, the patient suffers from cervical spondylosis, resulting in nerve root compression and numbness and numbness of the skin in the area innervated by the nerve root. If cervical spondylosis is suspected, CT films of the cervical spine can be taken to make a definite diagnosis and the correct treatment can be taken according to the condition of cervical spondylosis. Neck braking and jaw rest traction can be given, together with Chinese medicine manual massage.