- Chosen by Voters Jaw pain with these symptoms usually points to a sinus infection in the maxillary sinus, which is behind your cheekbone. When pressure builds in that sinus, it puts pressure on the nerves over the jaw and can be very painful. Many people with this pain see their dentist thinking it's a problem with the teeth, and after looking at the x-rays, the dentist then usually steers them back to the doctor to be evaluated for a sinus infection.As you are on antibiotics now, this will treat the infection and the pain will go away. Mucinex is a great very harmless medicine available over-the-counter in your pharmacy, which taken with a full glass of water will help thin the mucus in the sinuses, better allowing it to drain, and should relieve your symptoms more quickly.Feel better! Source(s): many years in the medical fieldpro bono consultant for medical accuracy in film, television and print fictionhttp://www.ehow.com/about_5143325_sinus-… 1 week ago 100% 1 Vote