When you need to ease the pain of a sinus infection you can try taking some over the counter pain medication and use an over the counter decongestant nose spray.
You can also treat the sinus infection by using a saline nose spray or rinsing your nasal passages with a saline nasal solution.
Using a humidifier in your room or taking a steamy shower or just sitting in the bathroom with the shower steaming can help clear up your nasal passages and help relive the pressure of a sinus infection.
Applying a warm compress to your forehead can also help with sinus infections and sleeping with your head elevated.
You should also stay hydrated by drinking plenty of water and try taking some over the counter sinus medication.
Within 1 to 2 weeks your sinus infection should go away and if not then you likely have a more severe sinus infection which needs a doctors treatment.
When you have a more severe sinus infection it can last as long as 3 months in some cases.