Quick Facts
What is sinusitis?
What causes sinusitis?
Sinusitis is usually caused by a:
The viral infection makes the tissue inside your nose swell. That's why your nose is stuffy when you get a cold. The swelling in your nose blocks the openings to your sinuses, which causes fluid to build up in the sinuses. Allergies Seasonal Allergy An allergy is when your body's immune system reacts to something harmless, such as food, plants, or medicine. Seasonal allergies are allergies that happen only during the time of year when a... read more also make the inside of your nose swell and can cause sinusitis.
Sometimes, bacteria get into the sinus fluid and cause:
Chronic sinusitis is more common if you have:
What are the symptoms of sinusitis?
How can doctors tell if I have sinusitis?
How do doctors treat sinusitis?
Drugs Mentioned In This Article
| Generic Name | Select Brand Names |
|---|---|
phenylephrine |
No US brand name |
