The scientific term for blood in the urine is hematuria. There are two types of hematuria: gross and microscopic. Only gross hematuria is a symptom of hydronephrosis. In other words, if you can see blood in your urine, it is probably a sign that something is going on with your kidneys. Blood in the urine won't appear bright red, but rather a light red or pink. In rarer cases, the blood will show up as a murkier shade of brown. Generally, if you see blood in your urine, see a doctor.

geargodz / Getty Images
This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.