text: i have a lump on one of my testicle.i had blood on my stool once. what condition is that?   lood in stool can be caused by hemorrhoids, anal fissures, polyps, crohn's disease, peptic ulcer disease, and diverticulitis. generally, the closer the bleeding site is to the anus, the blood will be a brighter red. thus, bleeding from the anus, rectum, and the sigmoid colon tend to be bright red, whereas bleeding from the transverse colon and the right colon (transverse and right colon are several feet away from the anus) tend to be dark red or maroon colored. stomach ulcers caused by ibuprofen, naproxen, or aspirin are common causes of upper gi bleeding. a testicular lump can be due to hernia, varicocele, epididymal cyst, spermatocele, hydrocele, tunica albuginea cyst .all other masses of the testicle are to be considered tumor until proven otherwise. a urologist can usually differentiate between the various lesions on physical examination. an ultrasound of the scrotum will generally be done if the diagnosis is not obvious or there is concern about tumor.  please see your doctor to determine what the exact cause may be.