Renal puncture is a necessary tool to diagnose kidney disease, bleeding is a common complication, according to the bleeding from mild to severe, the symptoms are divided into the following three kinds: I. Transient bleeding, patients have no obvious clinical symptoms, manifested as microscopic hematuria, urine routine laboratory test urine red blood cell count is elevated, patients should drink more water, diligent urination, microscopic hematuria can return to normal after 24 hours. Second, mild hemorrhage, hematoma under the renal envelope or around the kidney, patients show symptoms of lumbar pain and hematuria in the naked eye, they should rest in bed, compress the puncture site, drink more water and urinate regularly, and the symptoms will improve significantly after 2-3 days. Third, severe bleeding is extremely rare, and the main symptoms of patients are lumbar pain, meatus hematuria, excessive blood loss will cause anemia, and patients will have dizziness symptoms, which require timely hemostatic treatment, or even interventional surgery to stop bleeding.