I certainly would not jump to the conclusion of a disease.
I have the same thing as you and it is nothing to be concerned about. Most people do.
When you close your teeth together, there is a line formed. It is called the line of occlusion. Its where the teeth contact the cheeck and is of no consequence whatsoever. Think of what happens when you place a rubber band around your finger, not tight, but its there. After awhile, your finger will have the slight impression of the rubber band, in this case, that impression is reversed.
Now, there are several different types of papillae on the tongue. The papillae specific to the sides and rear of the tongue are larger, naturally.
What can happen, is if you have a sore throat, these papillae can enlarge as a result of an infection, but this is unrelated to your cheeks. You'll need to see a doctor for a diagnosis and prescription.