Hello, the surgeon that did my Nissen fundoplication surgery promised he could help me. It help for a month and then all hell broke loose. I had the gas, bloating, lower abdominal pain, a cycle of constipation and diarrhea. I didn't just have lower bloating but also up high. About 6 months after surgery I had bad acid reflux again. Before the surgery I asked if it didn't work if it could be undone. I was told sure can. After all the side effects and going back to see him several times he said he wouldn't undo but he wanted to do more surgery. At this point I researched and found another doctor. I had my new surgery a little over a month ago and happy to say no bloating, just a little gas but the gas is more food based. Oh, and he undone the Nissen. I can't eat much over a cup of food at a time so I eat little things 5-6 times a day. The doctor says as time goes on, in about a year or 2 I'll start to eat more regular meals because my stomach will stretch. I haven't felt this good in so long. I still have healing pains in the muscle but that's it. The first surgery I went with another doctor's referral. The second time I did a ton of my own research and went with who felt was best for me. Let me know if you have any other questions. Good luck to you.