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Symptoms and Signs of Blood in the urine

Doctor's Notes on Blood in the urine

Blood in the urine (hematuria) has many possible causes, including certain medications (such as aspirin, heparin, and penicillin), kidney stones, kidney disease, urinary tract infections (UTIs), enlarged prostate, blood diseases, injury to the urinary tract, blood disorders such as sickle cell disease, strenuous exercise, and some cancers. Any instance of blood in the urine should be evaluated by a doctor.

Blood in the urine is a symptom of many different conditions. In some cases the blood in the urine may be visible to the naked eye and in other instances it may only be detected through microscopic examination of the urine. Blood in the urine may occur on its own or may accompany other symptoms. Other symptoms that may accompany blood in the urine include painful urination, a need to urinate frequently or urgently, pus in the urine, and flank or abdominal pain.

Medical Author: John P. Cunha, DO, FACOEP
Medically Reviewed on 3/11/2019


Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.