The main causes of back cramps are the following: 1. Consider back muscle strains, patients mostly have upper extremity strenuous sports activities, such as badminton, tennis, rock climbing, etc., clinical manifestations of muscle cramps, pain, swelling at the back strains, may be accompanied by ipsilateral limb activity restrictions, X-rays or CT examinations are generally no signs of fracture, through rest, ice, hot compresses and other treatment symptoms can be relieved. 2. Back fasciitis, a sterile inflammation caused by repeated pulling of the back muscles, mostly caused by long-term heavy physical activity, sports or poor posture, clinical manifestations of back pain, swelling, cramps, can be relieved by rest, physical therapy. 3, cervical spondylosis, the posterior branch of the spinal nerve of the 4th-6th cervical spine extends to the back, innervating the skin and muscles of the back. When degenerative changes occur in the cervical spine, if the posterior branch of the spinal nerve is stretched to the 4th-6th cervical nerve, it will lead to pain and cramps in the back, and may be accompanied by upper limb weakness, finger numbness, dizziness and nausea.