If it's already difficult to make yourself go to the doctor for routine procedures, you may be even more hesitant to make an appointment to discuss a problem in a private part of your body. Try to remember that doctors are professionals. If embarrassment is stopping you from discussing something like blood (or something else that's unusual) in your urine or semen, pain in your groin or a lump in your testicles, it's time to let it go.
Blood in your urine can be detected during a physical, or you may notice it yourself. If you're also having difficulty or pain while urinating, it could be a bladder, urinary tract or kidney infection. These conditions are treatable with antibiotics. However, it could also be a symptom of something more serious, including kidney stones, an enlarged prostate or even cancer. So it's definitely worth getting checked out, even if it just happens once. The same is true of blood in the semen; sometimes it goes away on its own without any known cause, but it can also be a symptom of an infection or a more serious condition.