Renal puncture is only a minimally invasive needle puncture, which does not require an incision, and the whole puncture process is visible (guided by ultrasound images), and very little kidney tissue is obtained. Generally, you can walk on the ground after 24 hours of bed rest. However, the following complications can be seen: 1. hematuria: most people will have microscopic hematuria, which will disappear on its own for 1-5 days. 2-12% of people will have visual hematuria, which will disappear within 3 days for most people and last for about 1 week for a few people. only a few people may need blood transfusion and surgical hemostasis; 2. perirenal hematoma: a few people will have a small hematoma under the kidney envelope, which is generally It is not uncomfortable and does not require special treatment, and will be completely absorbed and dissipated in about 1 month. Individuals with more bleeding will have larger perirenal hematoma, which will be accompanied by pain in the ipsilateral lumbar region, abdominal distension, nausea and vomiting, and will heal after pain and hemostasis. It should be emphasized that the chances of serious bleeding caused by renal puncture requiring nephrectomy and accidental injury to other organs are rare. Renal puncture should be performed by a qualified pediatric nephrologist in a hospital that has the conditions for pediatric renal puncture. In a qualified hospital, the doctor who performs the kidney puncture has to undergo strict training and repeated practice, and the old and young doctors will pass on their skills to each other until the doctor has accumulated a lot of experience and is skilled before he or she can operate alone. Qualified hospitals and experienced doctors will strictly implement the operating procedures to minimize various risk factors.