If you have pain in the kidney area, it is recommended that you go to the hospital for examination to clarify the possible causes. 1. Kidney stones are a common cause of pain in the kidney area, which can cause acute pain or a feeling of lumbar distress and distension, etc. You need to go to the hospital for ultrasound examination of the kidney to exclude the presence of stones. 2.Tumor of kidney, benign tumor of kidney is mainly manifested as lumbar distress and lumbar distension, while malignant tumor of kidney is mainly manifested as severe pain. In addition to low back distension and low back distress, benign tumors are usually not accompanied by hematuria, but in the case of malignant tumors of the kidney, in addition to pain in the kidney area, they can also be accompanied by hematuria or red urine, which requires CT examination of the kidney for further diagnosis. 3. Pyelonephritis can cause pain in the kidney area, and the degree of pain varies according to the degree of inflammation. It is usually accompanied by frequent urination, urinary urgency or elevated body temperature, and requires routine urine tests to confirm the diagnosis.