Greetings XXXXXXX XXXXX,
The various causes for this bleeding in urine (called as hematuria) can be;
1) Kidney and bladder stones
2) Urinary Tract Obstruction
3) Urinary Tract injury; blunt injury like fall can also cause the blood in urine.
4) Excessive exercise
5) Urinary tract Infection
6) Sickle Cell Disease
7) Kidney and bladder tumor
Read the resource;
http://www.mayoclinic.com/health/blood-in-urine/DS01013
Urine culture and an ultrasound are the first investigative protocol. Intravenous pyelography, CT scan, cystoscopy, etc may be followed depending on the initial investigative results. The investigation of hematuria begins with a search for bacteruria (bacteria in urine) or pyuria (pus in urine). If either is present, a urine culture should be ordered to confirm urinary tract infection (UTI). In the absence of infection, the next step is to distinguish glomerular and nonglomerular sources of hematuria. Following would be required in step wise fashion;
1) Intravenous pyelography
2) Multidetector CT urography
3) Cystoscopy (camera examination)
Consulting a urologist would be advised, though an initial evaluation and investigations can be done by your primary care physician.
Please feel free for your follow up questions.
Dr. Arun
Doctor (MD)
MBBS, MS (General Surgery), Post-doctoral Fellowship in Sports Medicine