Hi. May be your nose is getting a lot of attention from you throughout the week(s) using a lot of tissue paper for example and when the nose is dried out and red from all the attention when you go running your sweat may have something to do with affecting the sensitive areas and the blood vessels close to the skin inside your nose. The nose needs a couple days to recover from infections on average and if you're having trouble breathing thru it " RICOLA " all natural herb and sugarless cough drops from Switzerland are powerful and clear the nose real easy to breathe great and taste good too and can take them any time like having a piece of candy and do not have to have a cold to use them. My guess, I hope this helps..