Sinus infections are best treated with evaluation by a physician and antibiotics, regardless of your smoking status. Once antibiotics are started you should feel better shortly.
A sinus infection is treated the same, whether or not you just quit smoking. You will likely need antibiotics as it's a bacterial infection. See your doctor.
Any infection in the body should be treated by a physician. Depending on the nature of the infection, a specific antibiotic will be prescribed to help heal the sinuses.
