Does hiatal hernia cause diarrhea and weight loss?

Should not: A hiatal hernia is just a loosening of the diaphragm allowing part of the stomach to slip up into the chest thereby allowing easier acid reflux to occur into the esophagus.

Variable: When large, hiatal hernias can cause chest pain and pressure, and difficulty swallows which could reduce food intake and lead to weight loss. If the colon was also involved with the hiatal hernia, bowel movements could be affected, but this is uncommon.