If you have had a cold for 10 days, it is possible that a cold has caused a sinus infection. Sinus infections are caused by inflammation and swelling of the sinus cavities due to bacterial, viral or fungal infections. Symptoms of a sinus infection include a runny nose, facial pain, headache, congestion, and postnasal drip.
If you suspect you have a sinus infection, you should consult a healthcare professional for diagnosis and treatment. Treatment for sinus infections usually includes antibiotics, decongestants, and over-the-counter medications to reduce inflammation. In some cases, the doctor may recommend sinus rinses or steroid nasal sprays to help reduce swelling. It is important to finish the full course of antibiotics, even if you start to feel better, to ensure that the infection is completely treated.
You can also take steps to reduce your risk of getting a sinus infection in the winter, such as getting a flu vaccine and reducing your exposure to cold air and allergens. Also, it's important to keep your nasal passages hydrated by drinking plenty of fluids and using saline nasal sprays.