Hi, i was away on a trip for a couple days and when i came back my dad told me that his friend had cooked some hamburger with some seasoning on it. It has been a few days since he had the hamburger he feels as if he has heart burn in the back of his throat but it doesnt hurt he says he also mentioned that it feels like there is something there and when he swallows he feels pressure.he told me this and i feel uneasy about it does anyone have an idea whats going on.? I want to add he is a smoker