Do you get sinus infections after a head cold? You’re not alone. An estimated 37 million Americans are affected every year by inflamed sinuses, a condition known as sinusitis. More than 90 percent of sinus infections that start as a cold are caused by viruses. But some turn into a bacterial infection, and it can be hard to tell the difference. Fortunately, sinus infections can be treated.

What Causes Sinus Infections?
Sinuses are air pockets within the bones around the nose. They produce mucus, which drains into the nose. Mucus can block a nose swollen from a cold, causing pain and infection. Symptoms can include congestion, sinus pressure, coughing, fever, and discolored mucus.

Some people are more prone to sinusitis. Your risk is greater if you have a weakened immune system or a disease such as asthma or cystic fibrosis. Exposure to allergens, air pollution, and tobacco smoke also increase risk.

Sometimes your nose itself is the problem. Having small nasal openings or soft growths called polyps makes it more likely mucus will be blocked. The sinuses aren’t able to clear themselves properly, which creates an environment where an infection can take hold.

When to Call the Doctor
If you have an infection lasting more than seven days, call your doctor.

Treatments may include antibiotics, corticosteroid nasal sprays, and even surgery in severe cases. Over-the-counter spray nasal decongestants can be helpful, but they should not be used longer than three days.