Back cramps are mostly caused by back muscle tissue spasms, common causes such as body fatigue, lactic acid buildup in the body constantly stimulate muscle cramps. Furthermore, local cold stimulation, especially cold weather body heat production is reduced, through muscle spasms and increase muscle excitability increased heat production. Exercise is too large, the body electrolyte disorder caused by the loss of water and salt, which makes the back muscle excitation and cause the phenomenon of twitching. Treatment is mainly to give local warmth, wear thick clothes to avoid cold, appropriate exercise, avoid excessive exercise. Local hot packs can be given to promote local blood circulation, but also through massage, acupuncture, electrotherapy, hot and cold packs, ultrasound and other methods to relieve local muscle stiffness, and promote regular movement of muscle cells. Improving local circulation can also improve cramps.