There are esophageal spasms that can occur there.

And the hiatal hernia will come up into the chest and cause pressure there or generally. I find lying on my left side reduces any pressure when it comes for me. (my stomach is twisted to the right).

If gas I have my hubby gently pounds my back...sometimes even just pressing on spots with his fingers while I am sitting up, will
move the gas around and enable my burping. This may be only true for me however, because my stomach is twisted 90 degrees towards my back to the right, and that is where the food is moved along to the intestine (for me only). People with normal positioning would feel otherwise I would think.