Kidney ultrasound after trauma is normal, if the body has no uncomfortable symptoms, kidney function is normal, generally there is no need to do CT, the specific situation should also be analyzed in conjunction with clinical symptoms. After the trauma, if there is no abnormal urination, normal blood pressure, no lower limb edema, normal renal ultrasound, normal renal function, generally do not need to carry out renal CT and other auxiliary examination. After the trauma kidney ultrasound is normal, if there are other uncomfortable symptoms, or kidney function abnormalities such as low back pain, you need to carry out lumbar spine auxiliary examination, as well as CT and other tests to clarify the cause of the disease, according to the results of the examination, combined with the clinical symptoms of the treatment in accordance with the doctor’s instructions.