I am a gastric bypass patient rxy and all the days i need to take nexium (esomeprazole) 40 mg. why do i suffer from heartburn since i hace rxy?

Heartburn bypass: Usually the gastric bypass cures heartburn and reflux. It is afterall an anti-reflux operation anatomically. However, you can still occasionally get heartburn. If your pouch large, it may have enough parietal cells to make excess acid. A gastro-gastric fistula can deliver acid from the gastric remnant to the pouch. You may also have a large hiatal hernia as well. Get an UGI and egd.

Postop bypass: Ulcers at bypass, stricture are possible, as is internal hernia. Your bariatric surgeon is best equipped to help you.