An anal fissure is a small tear or crack in the thin, moist tissue lining the anus (where stool leaves the body). It often ...
Medically reviewed by Robert Burakoff, MDMedically reviewed by Robert Burakoff, MD An anal fissure is a tear in the lining of ...
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 ...