Sinusitis can be caused by viruses, fungi, and bacteria. The main symptoms of sinusitis are a runny or stuffy nose and pain and pressure in your head and face. You may also have a yellow or green drainage or drip from your nose or down the back of your throat (postnasal discharge). Where you feel the pain and tenderness depends on which sinus is affected.
Other common symptoms of sinusitis may include:
- A headache.
- Bad breath.
- A cough that produces mucus.
- A fever.
- Pain in your teeth.
- A reduced sense of taste or smell.