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Acute sinusitis only lasts for a short time, defined by the American Academy of Otolaryngology as less than four weeks. An acute infection is usually a cold or other respiratory illness. Chronic sinus infections last for more than twelve weeks or continue to recur. Specialists agree that the main criteria for sinusitis include facial pain, infected nasal discharge, and congestion.
Many sinus infection symptoms are common to both acute and chronic forms. Seeing your doctor is the best way to learn if you have an infection, to find the cause, and to get treatment.
When you have a sinus infection, you may need to blow your nose often because of nasal discharge, which can be cloudy, green, or yellow. This discharge comes from your infected sinuses and drains into your nasal passages.
The discharge may also bypass your nose and drain down the back of your throat. You may feel a tickle, an itch, or even a sore throat. This is called a postnasal drip and it may cause you to cough at night when you're lying down to sleep, and in the morning after getting up. It may also cause your voice to sound hoarse.

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