If you have an ulcer of hernia in your stomach would that cause you to gain weight?

Unclear: It is not clear what you mean by an "ulcer of hernia in your stomach". People with peptic ulcer disease tend to lose weight, as their symptoms are exacerbated by meals.

No: If you have ulcers in your stomach due to a hiatal hernia, you may need to have it surgically repaired by a general or thoracic surgeon experienced in laparoscopic hiatal hernia repair.