How is the pain on the left side of the waist and back?

Pain in the left side of the back is considered to be lumbar muscle strain. According to the theory of Chinese medicine, it is caused by kidney deficiency. Symptoms are: pain on one or both sides of the waist or in the middle, or dull pain, or pain and discomfort. Treatment should be based on tonifying kidney and benefiting qi.

I suggest you see Chinese medicine. If confirmed, Zhuangyao Shen Jian Pill and Xiaohuoluo Pill can be selected for treatment. Pay attention to eating foods that have the functions of strengthening waist and kidney, promoting blood circulation and dredging collaterals, such as walnuts, chestnuts, tenderloin, shrimps, animal kidneys, leeks, hawthorn, loofah and medlar. Pay attention to rest, pay attention to posture at work, and avoid bending over for a long time and excessive load.