This question is based in the UK
(By "in-public", I'm referring to being around other people in general public places such as parties or cafe's, or on a train too)
Often in public I need to blow my nose, however I personally find it awkward, and feel it weird when other people do it. Is there a "standard" that you shouldn't blow your nose in public in certain situations? And if so, how should you deal with needing to blow your nose in those situations?