Why does dark liquor give me stomach and joint pain when a whole bottle of vodka in a night gives me nothing but a slight hangover

Everytime I drink a dark liquor my stomach starts to burn and my shoulder joints also start to burn. It’s extremely annoying and downright infuriating. Is there any reason for this besides the stupid fucking cogners? Because that’s the only thing I can think of as to why it hurts and burns. Not sure how people like dark liquor, shit’s nasty asf