First a short introduction: SWIM drinks rarely (maybe once in 2-3 months), only hard alcohol (usually vodka and rum, in the 40-60 %ABV range), usually not very large amounts (about the equivalent of ~150-200 ml pure ethanol at a time). He never got nausea nor hangovers from alcohol. Lately, SWIM noticed stomach pain (not nausea) from amounts as few as a good-sized shot of rum (~80-100ml). It started almost instantly (about 1 minute after starting drinking). The pain didn't seem serious but was far from pleasant. It goes away after 30-60 minutes. SWIM first thought that the strong alcohol was just hard on his stomach, but when he tried first eating and then drinking, the pain was exactly the same. I will probably stop alcohol use (because of this pain and because he can't really enjoy the effects anymore), but he was wondering if anyone else had this. Could this be a sign of a stomach ulcer or similar? PS: I haven't checked if this pain appears with beer/wine and isn't excited enough to try it.