What Is Hematuria? When blood gets into a person's urine (pee), doctors call it hematuria (hee-ma-TUR-ee-uh). Hematuria is pretty common, and most of the time it's not serious. Peeing is one way our bodies get rid of waste products. The process starts in the kidneys, which remove excess fluids and waste from the blood and turn them into urine. The urine then flows through tubes called ureters into the bladder, where it's stored until we pee it out. If blood cells leak into the urine at any part of the process, it causes hematuria. There are two kinds of hematuria: Microscopic hematuria is when blood in the urine can be seen only with a microscope. Often, this goes away without causing any problems. In fact, people might never know they have it unless they get a urine test. Gross hematuria is when you can see the blood in the urine even without a microscope. This is because there is enough blood in the urine to turn it red or tea-colored. What Causes Hematuria? Blood leaks into the urinary tract. This can happen anywhere in the urinary tract such as: in the kidneys, which remove waste and water from the blood to make pee in the ureters, which are tubes that carry pee from the kidneys to the bladder in the bladder, which stores pee in the urethra, where pee leaves the body Teens can get hematuria for many reasons. The more common causes are: bladder or kidney infections kidney stones high levels of calcium and other minerals in the urine a problem with the urinary tract injury to the kidneys or urinary tract taking some types of medicines, like some over-the-counter pain medicines strenuous exercise (many athletes, especially distance runners, get hematuria from time to time) Sometimes what looks like hematuria might be something else. Things like food dye, some foods (like beets or blackberries), the blood from your period and some prescription medicines can make pee look red. How Is Hematuria Diagnosed? If you ever see blood in your urine, don't panic. Chances are, it's no big deal. But you'll want to be sure, so tell your mom or dad and see a doctor. If you need treatment, it's good to get started right away. The doctor will do an exam and ask about symptoms, recent activities, and your medical history . You'll give a urine sample (pee in a cup) for testing. If the urine test comes back negative, the doctor will probably want another urine sample 1-2 weeks later to make sure the urine is free of red blood cells. If hematuria only happens once, treatment usually isn't needed. If urine samples point to something more serious or you've had a recent injury, you might need other tests, such as: a urine culture (more peeing in a cup) imaging tests like a kidney ultrasound, an MRI, or a CT scan How Is Hematuria Treated? Most teens who have hematuria won't need any kind of treatment for it. Hematuria that is due to a UTI will be treated with antibiotics. If you've been treated for hematuria, your doctor will probably want you to get follow-up tests to make sure your urine is free of red blood cells. When hematuria is a sign of something more serious — like kidney stones or a specific kidney disease — doctors will treat that condition. Back to Articles Related Articles Urine Test (Video) This video shows what it's like to get a urine test. Read More Kidneys and Urinary Tract The kidneys perform several functions that are essential to health, the most important of which are to filter blood and produce urine. Read More Kidney Stones Kidney stones mostly happen to adults, but sometimes teens can get them. Find out what kidney stones are, how to treat them, and ways to help prevent them. Read More Urinary Tract Infections A urinary tract infection (UTI) is one of the most common reasons that teens visit a doctor. Learn about the symptoms of UTIs, how they're treated, and more in this article. Read More Glomerulonephritis With glomerulonephritis, tiny filtering units in the kidneys stop working properly, causing problems like too much fluid in the body and swelling. Most of the time it can be treated. Find out more. Read More Bedwetting (Nocturnal Enuresis) Bedwetting can be embarrassing and upsetting for teens, but there are effective ways to correct the problem and scientists are constantly developing new treatments. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.