<s>[INST] My 4 year old had to have 2 small fillings placed in his his upper and lower back teeth.  His cheek is so swollen now, in side and out that it looks like someone hit him.  Could this be from biting his cheek whil it was numb, I really dont see bite marks. [/INST] Hellooo....read through your query I can say that it can be due to cheek biting can have injured some minor salivary gland causing swollen cheek. Marks won't be there properly...but don't worry.it will heal fast.if he is having pain apply colonel just before food.that's all needed.it will heal by itself.if after few days still swelling u can meet oral surgeon and see the problem.in my view it will heal very fast in few days....hope I have replied to your query....have a healthy day!!! </s>