beer makes a lot pain for me?

Tweet

hai friends, i am now 21 going to join a good jobs very soon. As my friends get their jobs they give me treat in a bar. I started drinking for the past two months and every time i drink the next day i suffer my stomach pain(only the next day). then i am back to normal. i really worry about this problem. Is only quiting BEERS is the solution or any think else friends. I cant say this problem to my parents since they dont like me drinking.