I've been having pain and irritation while swallowing and drinking, its red bumps on both sides(on tissues attached to neck side,behind toungue). I did casual smoking for 5-6 months, i got big ulcers due to it, visited to ent doc. I got treated fully. i didn't smoked last 4 months. But now i got cold and experincing same irritation as before. I m scared that red bumps may be of cancer. Please help.