There are many reasons that you might have blood in your urine. Having blood in your urine does not necessarily mean you have kidney disease. Some common causes are:
- Menstruation
- Strenuous (difficult) exercise
- Sexual activity
- Having a virus
- Injury
- Having an infection, such as a urinary tract infection (UTI)
Other more serious problems can also cause you to have blood in your urine. Some of these problems include:
- Kidney or bladder cancer
- Irritation or swelling in your kidneys, prostate (in men) or another part of your urinary tract
- Polycystic kidney disease
- Blood clots or diseases that cause problems with blood clotting
- Sickle cell disease
