My father coughs a lot sometimes after meals... Mostly it is after dinner and some times after lunch. After lunch it is very rare. He coughs little loudly and feels from stomach. He gets heart burn sometimes. He get saliva in his mouth some time which he spits out. Very very rare chest pain. Sometime he feels wheezing sound. Only once complained throat irritation. This issue is going on since one month. It's not daily issue but when he starts cough its for 1-2hrs. Please suggest what care needs to be taken.