Sore arms may be caused by overwork, cervical spondylosis, frozen shoulder, acute injury, tumor and metastatic cancer. 1. Excessive fatigue: long-term physical labor or after a lot of exercise will cause muscle fatigue, leading to lactic acid accumulation in the body, which will cause arm or general body aches and pains. 2. Cervical spondylosis: patients with cervical spondylosis may have cervical spine compression of the nerves, resulting in nerve root damage, which leads to pain and soreness in the back of the neck and other locations, and in severe cases, this symptom will radiate to the upper limbs. 3. Frozen shoulder: Frozen shoulder can also cause the symptoms of arm pain. When frozen shoulder is serious, it will involve the long head tendon at the root of biceps, which will cause arm pain, but this symptom is usually confined to the area around the diseased part. 4. Acute injury: soft tissue contusion after arm trauma, or even bone fracture, etc., can appear arm pain and other symptoms. 5. Malignant tumor: primary malignant tumors, such as localized osteosarcoma, giant cell tumor of bone, or even rhabdomyosarcoma of muscle tissue, or metastatic cancer transferred to the arm, all of which can present the symptoms of arm soreness. Cardiovascular disease can also appear arm soreness symptom because of involvement pain, and it is suggested that patients should find out the cause of the disease in time for treatment, so as not to miss the condition.