The first one is to rule out the presence of renal occupancy, the most common renal occupancy such as renal cysts or renal tumors, you can do CT or ultrasound of both kidneys to further clarify the diagnosis. Secondly, if there are small stones in the kidneys, it may cause vague pain in the kidneys. You can take oral lithotripter, drink water regularly, urinate more or exercise properly to help the discharge of small stones. The third urinary tract infection may cause vague pain in the kidneys, and such patients often have a combination of frequent urination, urgent urination, painful urination and even fever. Finally, lumbar muscle strain may also cause vague pain in the kidney area.