An anal fissure is a small tear or crack in the thin, moist tissue lining the anus (where stool leaves the body). It often ...
On volcanoes, a fissure is an elongated fracture or crack at the surface from which lava erupts. Fissure eruptions typically dwindle to a central vent after a period of hours or days. Occasionally ...
Medically reviewed by Robert Burakoff, MDMedically reviewed by Robert Burakoff, MD An anal fissure is a tear in the lining of ...