Blocked sinuses are no fun—especially in 2020, when every single seasonal sniffle or sinus headache results in a new round of “is it allergies, or COVID?” Methods of dealing with sinus congestion will frequently require you to take a pill (or several), some of them with side effects that can act as a pretty strong…
source https://lifehacker.com/clear-your-sinuses-in-20-seconds-with-your-tongue-and-y-5944971