Double g tube should be double J tube, double J extraction may cause infection as well as physical discomfort, need to do a good job of daily care, the main precautions include promoting urination, prevention of infection, daily care and so on 1. Promote urination: pay attention to drink more water, avoid holding urine, promote urinary tract system flushing through urination, and restore the function of urinary tract system as soon as possible. 2. Prevention of infection: early attention should be paid to observe whether the symptoms are accompanied by fever, appropriate application of antibiotic drugs to prevent infection, commonly used drugs include cefaclor and so on. 3. Daily care: pay attention to early to avoid strenuous waist exercise, pay attention to diet control, do not eat too stimulating food, pay attention to ensure sufficient rest. After extubation, symptoms such as low back pain, fever, and even hematuria need timely medical observation, and standardized treatment under the guidance of clinicians after diagnosis, to avoid delaying the condition.