I am not a doctor, but you may want to see your Dentist for him to take an Xray of the Molar area. Could be an abscessed tooth. Also make an appointment with your doctor. Do both!
Well, if your wisdom teeth have not come through, it possibly may be a wisdom tooth trying to break through.
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.
Best wishes
I get bumps/swelling on my face/head too. The doctor did a sonagram and they said everything was "normal". I've had this twice. Once on my left temple and once behind my right ear. One "specialist" told me it was TMJ and to see a dentist for exercises to help.