The cause of Hiatus Hernia is not known. The result of a weakening of the supporting tissue can lead to this condition. Children can have this condition from birth. It is usually associated with reflux of stomach fluids into the oesophagus.
Anything that puts intense pressure on the abdomen including persistent or severe coughing or vomiting, straining while going to the bathroom, pregnancy or lifting heavy objects can contribute to hiatal hernias.
Hiatus hernias are very common, especially in people over 50 years old. This can lead to the entry of gastric acid from the stomach into the esophagus.
Obesity and smoking may be risk factors in adults.