Hi Lewis,
Yep sometimes they have told me not to eat popcorn or strawberries anything with seeds anything with peanuts, the pain on my left side of my abdomen is usually more towards the front and it just hurts and it does feel like gas. I don't get it very often since I started eating differently and popcorn doesn't bother me at all. It's all so very confusing because I've been diagnosed with ulcers,IBS, diverticulitis. Every time I go get a colonoscopy it's different but I've never had polyps I'm 63 so I've been about five times. I can't say that what they call diverticulitis is pain on my left side which does feel a lot like gas or bloating and all sometimes get constipation but it has happened a lot less since I changed my diet and I still eat popcorn just not as much in one sitting. But I also eat flax seeds and they're tiny so they're supposed to be able to get into the holes of your colon if you have diverticulitis and cause pain so everybody's just different. I am very interested in studying all research on microbiomes and stomach issues because I really believe that is where all our troubles start. Since I started taking care of my stomach issues more and eating the right things then I definitely feel better everywhere even with joint pain. Been diagnosed with SIBO too I need my research found that antibiotics are really not good for us and with sibo some people would scleroderma have to be on that constantly. That's when I changed applesauce and sauerkraut for my prebiotics and probiotics I can't believe how amazingly simple it's been.