sinus surgery 2 1/2 years ago - significantly reduced frequency of sinus infections/bronchitis. I have had three sinus infections since Sept with the most recent for 5 weeks despite daily sinus washes, decongestant and qnasal. Last week an ENT said some scar tissue formed at the opening of the sinuses. I had a ct scan today and will see the ENT next week again to discuss possible surgery. Why would scar tissue form after 2 1/2 years. Will more scar tissue form after surgery to remove tissue