Hidden pain in the right side of the kidney can be caused by lumbar muscle strain, kidney stone, hydronephrosis, right kidney cyst, etc. In most cases, it is not caused by kidney diseases. In most cases, the right side of the kidney is not caused by kidney diseases, such as lumbar muscle strain, which is very common in clinical practice, and one difference between kidney diseases is that it has a lot to do with activities, especially bending activities. The rest are kidney diseases, the more common is kidney stones, kidney stones most of the pain is more intense, however, some long-term stones may cause hidden pain in the right kidney. Hydronephrosis caused by kidney stones or other diseases can also cause hidden pain in the right kidney. Kidney cysts are a benign lesion of the kidneys and do not cause symptoms if the cyst is relatively small. If the cyst is large, especially more than 6-7 centimeters, it will cause pain in the kidney area if it pulls on the kidney peritoneum more obviously.