Precautions after percutaneous nephrolithotomy Drainage tube care: 1. Do not pull to prevent the drainage tube from dislodging and keep the drainage bag positioned below the level of the kidney or bladder. 2. Prevent reflexion, distortion, and compression of the drainage tube to keep it open. Most patients can leave the bed for 48 hours after surgery, but depending on the condition of the drainage tube, sudden force needs to be avoided. 3, if the color of the drainage tube suddenly turns bright red during activity, you should immediately rest in bed and notify the health care provider. 4.If the nephrostomy tube is accidentally pulled out, immediately press the wound and rest in bed, while informing the medical staff as soon as possible. Dietary guidance: 1. Make dietary adjustments as prompted by the results of stone composition analysis. 2.Patients with urinary tract stones should drink a lot of water, at least 2000 ml of water per day and moderate amount of water before bedtime to increase urine volume and reduce the chance of stone formation. 3.Eat easily digestible food and keep the bowels open. Patients with endoureteral stent tubes should avoid strenuous physical activities such as running and jumping, and especially reduce and slow down lumbar activities after discharge. 2. Pay attention to perineal hygiene to avoid urinary tract infection. Self-observation content for patients with internal stent tube: Pay attention to the color of urination. If occasional urinary frequency, urinary urgency, slight swelling and pain in the lumbar area on the side of surgery and slight hematuria symptoms occur, please do not be nervous, mostly caused by the stimulation of the internal stent tube, which can generally be relieved after rest and medication. If you continue to have hematuria, blood clots, fever, or severe pain in the lower back, please communicate with the doctor in charge or go to the hospital for follow-up examination. Removal of internal stent tube: Patients should keep in mind that there is a stent tube left in the body and come to the hospital for removal of the internal stent tube 4-6 weeks after the operation (depending on the opinion of the doctor in charge).