The treatment depends on the cause of the sinusitis. Bacterial infections are generally treated with antibiotics, which have to be prescribed by a doctor.
Contrarily, viral infections cannot be treated with antibiotics, as these do not kill viruses.
Cortisone nasal sprays are often prescribed to reduce nasal swelling.
To treat chronic sinusitis, especially if the infection is caused by a deviation of the nasal septum, surgery might be necessary.
In this case, surgery does not only cure the sinusitis, but helps prevent a recurrence of the infection.
When a patient is affected by chronic sinusitis and suffers from seasonal allergies, doctors often prescribe cyclical allergy medications to prevent allergic reactions to trigger sinusitis.