 [ Symptoms ] i was told i had blood in my urine and to see a doctor why i did not see any blood [ Disease ] this is called occult blood or hidden blood just a few blood cells in the urine can cause the chemical dipstick test to be positive so usually the presence of blood is confirmed microscopically on a urine specimen that is centrifuged if no blood is found than this could just be a false positive test if blood is found in small amounts a cause will need to be determined traces of blood can come simply from irritation of the urethra so this does not necessarily mean something is wrong infections or other types of inflammation kidneys stones etc all can cause hematuria medical term for blood in the urine