From the perspective of traditional Chinese medicine, the waist is the house of kidney, and the pain in the upper right of the waist is a manifestation of kidney deficiency if it is not caused by external force or sprain. The kidney examined by western medicine is just a kidney, which is not exactly the same as that mentioned by Chinese medicine. The kidney in TCM is a circulatory system, which is called renal circulatory system. Besides kidney, it also includes kidney qi, kidney essence, kidney blood, kidney meridian and other substances. Western medicine does not recognize the existence of "qi" in the human body, so you can't play the expected role by going to a western medicine hospital for kidney examination. The kidney deficiency leads to lumbago, so you can take drugs to tonify kidney and replenish essence. However, kidney deficiency can be divided into yin and yang, cold and heat, so it is necessary to differentiate syndrome properly before taking medicine, otherwise it will be counterproductive. I suggest you find a good Chinese doctor to dialectically carefully, and then take medicine to adjust the problem. And if you play dumbbells, your back hurts, which is probably caused by sprain or long-term inactivity. This is tendon injury. From the perspective of traditional Chinese medicine, the main reinforcement of the liver can be solved by soothing the liver and regulating qi. In this case, you can gradually solve the problem of low back pain by taking Shugan Pill or Gan Yang Pill. It can also be treated by massage or acupuncture, which can solve the problem quickly. This is my answer to your question. Thank you.