What is considered a medical reason for a gastric bypass revision?

A gastric bypass revision is typically considered for medical reasons when a patient experiences significant complications or inadequate weight loss despite following dietary and lifestyle recommendations. The most common medical reasons include severe acid reflux (GERD) that does not respond to medication, chronic nausea or vomiting, persistent dumping syndrome that affects quality of life, and complications such as ulcers, strictures, or a gastro-gastric fistula (an abnormal connection between the stomach and the bypassed portion).
Weight regain can also be a medical reason for revision if it is linked to anatomical changes, such as a dilated gastric pouch or enlarged stoma (the connection between the stomach and small intestine), which may allow food to pass too quickly or lead to increased food intake. In such cases, revision surgery can help restore restriction or adjust the anatomy to improve weight loss outcomes.
Before recommending revision surgery, a bariatric surgeon will typically perform imaging studies, such as an upper GI series or endoscopy, to assess whether there are structural changes contributing to symptoms or weight regain. A full metabolic evaluation may also be necessary to rule out hormonal factors that could be affecting weight loss.
Not every case of weight regain or difficulty with portion control qualifies for a revision. Surgery is typically reserved for patients with clear anatomical or medical issues that impact their health and quality of life. If you are experiencing any of these concerns, it’s important to consult with a bariatric specialist who can assess your situation and determine whether revision surgery is the best option for you.

Hello
Thanks for your time and question.
Here some of the most common medical reasons for Gastric Bypass revision, Gastric band intolerance, Severe persistent reflux, Food intolerance, and Weight regain. if you experience any of this symptoms i would recommend you to visit a certified bariatric surgeon to get an evaluation. 
Good luck in this journey, blessings .!
Dr. Pablo

This is not an easy question to answer!
Even experts don't agree on the indications for Revisional Bariatric Surgery.
But in general, if you have a complication, or something is wrong with your Gastric Bypass, you should ask for advice from a surgeon with experience in Revisional Surgery.
The other most common reason is weight gain, inadequate weight loss or return of medical issues.
Your options could be just revising the pouch or changing your surgey to a malabsorption type with longer bypassed intestine or Bilio-Pancreatic Diversion.