I had thyroid cancer 6 years ago and take levothyroxine. why if i drink a beer or two i wake up very hung over and feel nausea and my stomach hurts.

Alcohol intolerance: Thyroid hormone is like a furnace spark for your entire metabolic system and every cell , alcohol is like poring gas on this fine system , also some lack the enzyme specially some asians , to break down alcohol , your problem may have correlation , some people even have allergy to alcohol , it is good you don't have to drink and get sick