I have been on medication for a sinus infection (augmentin) finished 10 days but now I'm in severe pain in my jaw, simple and cheek bone area. Help!

Toothache. Is the most common cause for orofacial pain. Sinus infection can cause a toothache — especially in the upper rear teeth, which are close to the sinuses. If you have a persistent jaw pain, first consult your dentist for an exam. The dentist needs to rule out dental causes for the pain, such as periodontal disease or dental abscesses/pulpitis.