I would have thought it would show up as inflammation unless it is really mild. I had it for a couple of weeks before ending up in a&e with it where they gave me pantoprazole, a ppi. A month of that (plus a very restricted diet) got rid of the burning, gnawing feeling but it was really bad for my digestion and i weaned off pretty quickly. I had issues down the left side of my colon and some constipation.
If it is that then you need a healing diet, things like porridge, chicken soup, etc, avoiding coffee, alcohol, anything spicy or acidic or carbonated. You need well cooked, easily digestible food, things like cooked rice, slow cooked chicken, lean fish and veggies like carrot, Broccoli, leeks etc.
I used a supplement called Nutrigold Colex, two on an empty stomach every morning, still take that every day 2 years later. It has l-glutamine in which is great for stomach and intestinal lining. So does zinc carnosine, a form of zinc known for helping the GI tract. Plus another one called DGL Plus by Pure Encapsulations. Both help repair the mucous lining.
Aloe vera juice (a tablespoon) before meals helped. And don't overload your tummy ever.
I also did a split dose of the ppi am and pm as found the pain was worse at night.
Do you find it is slightly better when you've just eaten? But that you feel full very quickly?