Make sure your shoes are well fitting, and comfortable. Same applies for attire.
Use deodorant
Use a sunscreen (Like Navzzz said)
Breathe in from nose, and breathe out from your mouth
Avoid shallow breathing/take deep breaths while running
Don't get self conscious if people look
Don't drink too much water all at once
^^ I googled images of nostrils to post for you but they reminded me of @MadScientist So maybe we have him back to help you out here? I’m sure he can explain that better with his own pics
I’m not that type of a man who “measure” their things. Overall dont care about nostrils however i do want to know the answer if exhaling open mouth is better or exhaling by nose?
Why cant you believe that? Its a serious question. See I know that some people suggest that while runing inhale with closed mouth and exhale with open mouth. But someone suggested me that if you inhale with close mouth (i.e. nose) and exhale with nose as well, keeping your mouth shut, thats how lungs get stronger. Get it?