According to what you said, you should be caused by cold and muscle injury. You can check the dietotherapy method of Shiquan Dabu Decoction on the Internet to recuperate. Usually, we should pay attention not to eat raw and cold food, drink hot ginger soup or ginseng soup, keep warm, don't stay up late, and strengthen exercise. Press and knead as shown below to improve blood circulation.

Everything is caused by body cold. As long as the physique is well conditioned, many problems will be solved. Try it in my way, you will feel it, and it will work soon. If possible, it is best to warm your back and buttocks for 4-6 hours every day. No matter how good the analysis is, it is not as good as the analysis. In fact, many problems are caused by bad life, diet, work habits and incorrect concepts.