This document defines hernia and describes the different types of hernias. It explains that a hernia is an abnormal protrusion of an organ or tissue through a weak spot in the muscle wall of the cavity it is normally contained within. The most common locations for hernias are the abdominal cavity, inguinal canal, umbilicus, and femoral ring. Symptoms can include a bulge or lump, pain, discomfort, vomiting, and difficulty breathing. Hernias are typically diagnosed through physical examination, ultrasound, x-ray, or barium swallow. Treatment options include medical management with a truss or surgical repair through herniotomy, herniorrhaphy, or hernioplasty procedures.