Can sinus infection get better without medication?

Some can: The body can fight off some sinus infections over an extended period of time (4-6 weeks) but the discomfort & symptoms may remain for the duration. Decongestant nasal sprays & nasal wash out with saline may help over time. People did get these & survive before we had antibiotics. However, the prolonged course and symptoms may make it unwise to try.Significant complications can occur.