Acute sinusitis is a short-term inflammation of the sinuses, most often including a sinus infection. (Sinusitis is also known as rhinosinusitis because the swelling almost always includes nasal tissue as well as sinus tissue.) The sinuses are four paired cavities (spaces) in the head. They are connected by narrow channels. The sinuses make thin mucus that drains out of the channels of the nose, cleaning the nose. Typically filled with air, the sinuses can become blocked by fluid and swell from irritation. When this happens, they can become infected.
Acute sinusitis lasts less than a month. Your symptoms may go away by themselves within about 10 days, but it may take up to three or four weeks.
Some people are more likely than others to get acute sinusitis. These include:
Acute sinusitis is often caused by a common cold or allergies. It can also be caused by a bacterial infection or fungus that causes the sinuses to swell and become blocked.
The main symptoms include:
You may also experience:
Acute sinusitis is usually diagnosed by discussing all of your symptoms and medical history with your doctor. In a physical exam, your doctor will look at the ears, nose, and throat to check for any blockage, swelling, and drainage. If allergies are suspected, your doctor will can have an allergy test performed to determine what allergens might be the cause of your sinusitis.
Acute sinusitis is typically a short-term condition that is not too severe. For many people, little or no treatment is needed. Most people get better on their own after seven to 10 days.
Antibiotics are only helpful for bacterial infections. Most sinusitis is due to viruses or other causes that are not cured by antibiotics.
Other treatment options include ways to manage your symptoms. You can:
There are rarely complications to acute sinusitis. You are likely to recover on your own. However, it is possible in very rare cases that an infection could spread farther into other spaces in your nervous system, like your brain, eyes, or spinal cord.
Do not smoke. Smoking is not good for you or for people around you, since this can cause mucous to become clogged in the nose/sinuses. Avoid being around second-hand smoke, as well as other triggers like animal dander, dust, mold and pollen. Take pains to prevent sinus and other infections by:
Though many cases of acute sinusitis can improve with little to no treatment, you should call the doctor if you experience any painful symptoms. An antibiotic may be needed for a bacterial infection.
If you find that your sinuses do not feel better after 10 days, symptoms have gotten worse, or you have symptoms that initially improved and then worsen five to six days later (“double sickening”), you should contact your healthcare provider. Symptoms that continue after about four weeks may mean you have subacute or chronic sinusitis. If you develop other types of symptoms, such as severe eye swelling, or you are just not sure what you should do next, call your provider.
If you have facial pain, and you have healthy teeth, you can try things like nasal rinses and warm, wet washcloths on your face to see if you find some relief. If so, and if your symptoms go away in about 10 days, you probably have had acute sinusitis and it has gotten better on its own. If not, and you continue to feel ill after three or four weeks, call your provider.
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Last reviewed by a Cleveland Clinic medical professional on 06/04/2020.