I had this problem for years and years, I actually think this may have been from birth. I could never properly burp, even when I desperately wanted to with a sore and bloated stomach. I would sometimes randomly release small amounts of air through my mouth which gave me small release. Strange noise and feeling when I did that. If I was bloated, I would sometimes stick my fingers down my throat to trigger this release, but it was not a proper burp. I learned not to overeat and avoid being bloated so I wouldn't experience the painful bloat with little relief.

Eventually I developed heartburn and acid reflux and my doctor prescribed me rabeprazole. After taking this medication, I loudly and properly burped! Unfortunately I do not have any control over the burping and it comes out loud and at random. It's nice to have this as I no long suffer from a bloated sore stomach when gas has built up, my body will burp and release. The random release can be embarassing so I try not to drink carbonated beverages or eat too much in public.

Even though I have recovered from this, it's nice to see that I wasn't alone in this. Cheers!