Inner cheek swelling. N wat is d cure?

Hi I'm 30 yrs old... Recently I noticed that my inner cheek gets swollen whenever I eat outside spicy or hot food. There is no pain.. But d swelling becomes too worst tat it makes eating very difficult... It subsides wen I eat cream... I noticed tat my inner cheek near wisdom tooth is of grey in colour... On both d sides of my cheeks... Wat is it n wat is d cure? Plz help. I also noticed few months back something like a white partical inbetween my teeth... Only after trying to remove it with toothpick I realised tat was a small tiny tooth grown inbetween two teeths. On one occasion I had severe jaw pain n severe headache... D pain subsided after medication from a general physician... Plz help. I had asked by my family doctor to meet dentist for d tiny tooth.