Got COVID 2 years ago, lost taste and smell. Since then I've had significant mucus, worse in am, worse with eating, stress, etc as many have noted. Have history of anaphylaxis to peanuts, cold induced anaphylaxis one time as well. Both related to mast cell hypersensitivity. Did reading on my own, then read all the posts here and both brought me to Cromolyn, a mast cell stabilizer. Started NasalCrom, nasal spray, and since then symptoms are so much more manageable. I'm a physician and had a very hard time talking to patients because I always had to clear my throat and now I can make it through the day. My symptoms are not totally gone but 90% better. NasalCrom is truly a miracle. I think this phlegm production that so many talk about here after COVID has to due with persistent mast cell release of histamine. NasalCrom + Claritin and I finally have relief after 2 years. It was so hard on me mentally and now I feel some relief as there is something that can help. I hope everyone who reads this will try this and find improvement. I never post on blogs or the internet in general but this is just too important not to share.