Pyelonephritis may have hematuria. Pyelonephritis is a disease caused by pathogen infection, which may present systemic symptoms such as fever, chills, nausea, vomiting, urinary system symptoms such as frequent urination, urgency, painful urination, difficulty in urination, as well as the symptom of low back pain. Some patients have hematuria due to bacterial invasion of the upper urinary tract, resulting in the destruction of local mucosal tissues, which may lead to damage of small capillaries. However, there are many causes of hematuria, such as kidney stones, nephritis, urinary system tumors, etc. Not all hematuria is caused by pyelonephritis. The diagnosis of pyelonephritis requires a combination of symptoms, urine culture, urine routine and other related tests. Patients with pyelonephritis are advised to go to regular hospitals for timely consultation and targeted treatment under the guidance of doctors.