Tell If You Have a Sinus Infection - Keep a calendar and mark off each day you've been ill. Since the common cold can last from one to two weeks, you can determine whether your ailment has lasted longer than what is normal for a cold or flu. You will also be able to give your doctor an accurate time frame of your illness when you go to visit her. If you've been sick for longer than a week or two, it's time to examine the symptoms you're experiencing.
Identify the symptoms of sinus infection. The most common symptoms are facial pain, pain in the teeth, sore throat, a persistent cough which may become worse at night, and fever. Take your temperature regularly using a thermometer, and make note of any fever temperatures (those above 98.6 degrees F). Using your notepad, document your temperatures when you take them, and also keep a list of the symptoms that you are experiencing.