When there is no room, or very little room in the jaw, top or bottom, the wisdom teeth
have no room to grow
through and can cause a lot of pain and swelling. If you feel this could be a wisdom tooth trying to come through, you will need to see your dentist.
The other possibility is swollen glands or a blocked salivary gland which may be a viral or a bacterial infection, and if this is the case you will need to see your doctor.
Let me know how you get on.