Urinary tract infection may cause high creatinine. Early or less symptomatic urinary tract infection will not produce obvious clinical consequences, but if the treatment is not timely and the condition is more serious, it will cause damage to kidney function, which will cause creatinine elevation when it reaches a certain level. Urinary tract infections include pyelonephritis, ureteral inflammation, bladder inflammation and urethral inflammation. The common clinical symptoms are frequent urination, urgent urination, painful urination, itching in the urethra, pain in the lower back and abdomen, fever, high fever and so on. Patients need to go to the hospital for blood routine, urine routine, ultrasound, bacterial culture, drug sensitivity test and other tests to clarify the diagnosis, and then choose the appropriate treatment method under the guidance of a professional physician, to be reviewed in a timely manner to determine the effectiveness of treatment.