Sore arms are usually not indicative of cancer and may be caused by physiological reasons, cervical spondylosis, peripheral neuritis, medial epicondylitis of the humerus, frozen shoulder and other factors. 1. Physiological reasons: If you are engaged in heavy physical activities on your arms for a long time, it will easily cause fatigue of arm muscles and accumulation of lactic acid, which will lead to arm soreness. 2. Cervical spondylosis: patients suffering from cervical spondylosis, when the nerve is compressed, it will easily cause brachial plexus nerve involvement, resulting in arm neuropathic pain. 3. Peripheral neuritis: for patients with peripheral nerve inflammation, such as ulnar neuritis, brachial plexus neuritis, radial neuritis, etc., in the inflammatory substances to stimulate the nerve, it will be easy to produce arm pain. 4. Epicondylitis of the humerus: patients suffering from epicondylitis of the humerus, i.e. tennis elbow, may also experience arm pain during elbow and wrist joint activities. 5. Frozen shoulder: When the patient suffers from frozen shoulder, when the condition is serious, the pain will radiate to other parts, such as radiating to the arm, which will cause arm pain. Patients with arm pain should go to the hospital in time to get a clear diagnosis and further treatment.