One of the causes of maxillary sinusitis is a tooth
abscess that has leaked the infection into the maxillary sinus. The teeth may be X-rayed to find this.
• Ethmoid sinuses. If infection occurs, you may get puffy eyes and pain between them. The sides of your nose may get tender to the touch, your nose may get stuffy, and you won’t be able to smell so well. You may also get a splitting headache, felt most intensely in the forehead.
• Sphenoid sinuses.