If there is vague pain in the kidney area, further examination is needed to clarify the possible causes. 1. Infectious lesions in the kidney, such as renal abscess, pyelonephritis or nephritis, may cause vague pain in the early stage, which may also be accompanied by abnormal changes in urination. 2. Changes in the kidney, such as stones, tumors and fluid retention, may cause discomfort in the kidney area. It is necessary to take ultrasound of urinary system or CT examination of kidney to confirm the diagnosis of stones, fluid accumulation, tumor and so on. If the above factors exist, extracorporeal shock wave lithotripsy or drainage surgery should be performed as appropriate. 3. extra-renal factors in the kidney area cause vague pain, such as lumbar muscle strain, lumbar disc herniation, etc. Pain at the projection point of the body surface, or vague pain when bending or strenuous activities of the lower back, further examination of the lumbar spine or lumbar muscle for related lesions is needed.