The sudden pain in the back like pins and needles is usually due to muscle spasm in the back muscles. This is usually due to the fact that the muscles in this area are in a state of full contraction when doing a local action in a cold state, and the muscle spasms occur over time. After this situation: first, should do to make these spastic muscles in the state of pulling action, such as forceful side bending and so on. After these muscles are obviously pulled, the spasm can be effectively relieved. Second, you can use a warm water bag for hot compresses, by increasing the local temperature can make spasms of tense muscles fully relaxed. Can effectively prevent further aggravation of spasm and can promote blood circulation, accelerate the metabolism of inflammatory metabolites, relieve pain. Thirdly, you can take oral Eperisone Hydrochloride tablets, the drug belongs to the muscle relaxant, after oral intake can make the tense muscles become relaxed, can effectively prevent and reduce the pain.