Welcome to my world, I have been dealing with thick post nasal drip deep in my sinuses since I got Covid in 2020. My ENT said that Covid attacks the sinuses.

Last year I had Balloon sinuplasty, turbinate reduction and cryotherapy on the nerve that creates mucus, none of which worked. 2 weeks ago I had the Neuromark procedure where he went in and lasered 4 nerves that are responsible for producing mucus. I'm not sure if it has worked yet as it can take a few months for the nerves to settle down.