This pain is rather mild and "lighter" in feeling. Does not radiate through my body. Would have to say it was closer to the top than a "deep" pain. Not trying to argue your points at all, just explaining the feeling. If I move in a certain direction and it sets off the pain, most likely if I do that same range of motion it does not repeat the pain. Unlike a muscle pain that the same range of motion always sets it of consistently.
On empty stomach.
If indigestion is present.
The last time I felt this similar kind of centralized burning sensation, I had the norovirus. Before realizing it was the norovirus I suspected some sort of food poisoning and I took a large dose of grapefruit seed extract. Not sure whether that is what caused the burning sensation along with added excess stomach acid but it too was centralized. I was put proton pump inhibitors and in a day it went away. I suppose I could try that. Just trying to make sense of this. We have an incredibly high deductible on insurance, so I'm trying to cover all the bases before resorting to the doc.