... carefullyat the roof of your mouth, back of your throat, and insides of your cheeks and lips. Your doctor or dentistalso will gently pull out your tongue so it can be of joints, and the inside of bones. ... ideas and recipes.Sore MouthIf your mouth is sore, you may find that you want to avoid acidic foods, such as oranges and tomatoes. Also, to protect your mouth during cancer treatment, it helps to ... hard for you to eat, talk, and swallow. It can also lead to toothdecay. You may find it helpful to drink lots of water,suck ice chips or sugar-free hard candy, and use asaliva substitute to moisten...