A hiatus hernia is where part of the stomach pushes up into the lower chest through a defect in the diaphragm. Most people with a hiatus hernia do not have any symptoms or problems. However, the hernia makes you more prone to reflux acid into your oesophagus (gullet) which can cause heartburn and other symptoms. If symptoms do occur, treatment with acid-suppressing medication usually works well.
1. Sliding Hiatus Hernia
Is the most common type. In this situation, the sphincter at the bottom of the oesophagus and the top of the stomach protrudes through the opening (hiatus) in the diaphragm. The hernia may slide up and down, in and out of the lower chest. It is often quite small.
2. Paraoesophageal (Rolling) Hiatus Hernia
Is less common. In this situation, part of the stomach protrudes up through the opening in the diaphragm next to the oesophagus.