I think i have a sinus infection how can i treat it?

Multifactorial: You can irrigate the sinuses with a netti-pot and saline/bicarb rinse, use a decongestant, such as pseudoephedrine, remain hydrated and take Acetaminophen or Aspirin for headache or other discomfort. If, however, this persists, you develop facial pain, redness, swelling, severe persistent headache, fever, or other problems, see a doctor asap.