Kidney injury is often combined with other organ injuries and the symptoms can mask each other. Therefore, in addition to understanding the urinary symptoms, we should also observe the patient’s mental changes, pupil size, the presence of pressure pain and rebound pain in the abdomen, as well as the skeletal condition. Absolute bed rest for 2-4 weeks and disappearance of red blood cells on urinalysis should be followed by 1 week of bed rest before getting out of bed. Keep urinary catheter unobstructed and properly fixed to prevent retrograde infection, observe and record the color and quality of urine, keep the hourly urine volume greater than 60ml, and keep one urine specimen every hour for comparison and observation. Measure the specific gravity of urine to judge the change of condition. After 1-2 weeks, the urine is normal and the urinary catheter can be removed. Hematoma and urinary extravasation after kidney injury are conducive to bacterial growth, antibiotics should be applied to prevent infection following medical advice. Patients should eat reasonably, drink appropriately and keep stools unobstructed according to their condition to avoid secondary bleeding caused by increased abdominal pressure. Strengthen the physiological care of patients to avoid pressure sores and lower body venous thrombosis, closely monitor the changes of patients’ vital signs, replenish blood volume, maintain water-electrolyte balance, etc.