The presence of blood in the urine. Blood in the urine is usually caused by kidney and urinary tract diseases. In women, the blood may appear to be in the urine when it's actually coming from the vagina . In men, the urethra carries both urine and semen out of the body and what may be mistaken for urinary bleeding is sometimes a bloody ejaculation usually due to a prostate problem.
Bladder infections are more common in women than in men and are especially common during pregnancy .
Bladder infections are usually accompanied by pain or burning on urination , frequent urgent urination, and occasionally blood in the urine. Discoloration from drugs or foods can mimic blood in the urine. This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on age and gender of the affected person, as well as on the specific characteristics of the symptom such as time course, aggravating factors, relieving factors, and associated complaints.