In adults, the most common causes are hemorrhoids and diverticulosis, both of which are relatively benign; however, it can also be caused by colorectal cancer. In a newborn infant (neonate),<unk>  may be the result of swallowed maternal blood at the time of delivery, but can also be an initial symptom of necrotizing enterocolitis, a serious condition affecting premature infants. In adolescents and young adults, inflammatory bowel disease, particularly ulcerative colitis, is a serious cause of<unk>  that must be considered and excluded.<unk>  can be due to upper gastrointestinal bleeding.  However, as the blood from such a bleeding is usually chemically modified by action of acid and enzymes, it presents more commonly as melena.
Hematochezia causes
Epistaxis causes
Cystitis causes
Anal fissure causes
Appendicular abscess causes
Appendicitis causes
Volvulus causes
Anal fistula causes