3 days after playing closed needle pain aggravation, there are two main reasons: First, after playing closed needle 3 days after the time of the basic effect disappeared, because the drug components are lidocaine hydrochloride and hormonal drugs, the half-life of these drugs is about 1 day or so, about 3 days when the effect has basically disappeared, so it will lead to pain continue to appear, there may be pain aggravation. Second, because only local closed needle, can only relieve the local pain symptoms, but can not get rid of the root cause of the disease, because the closed needle is usually applied to the local injury and bony hyperplasia caused by the pain, even after playing closed needle local symptoms reduced, but the injury and bone hyperplasia, inflammatory lesions still exist, in the absence of adequate rest or too much activity will lead to further aggravation of the lesions. The resulting injury and inflammatory metabolites will gradually accumulate, leading to more severe pain.