 [ Symptoms ] why do i get red spots on the edges of my lips after i have exercised  i get a few red spots on the edges of my lips after i have done a lot of cardio and gotten really hot it seems like they are in the spots where i have had cold sores in the past maybe where they have scarred or something they pretty much only show up after a good exercise on a regular basis and before exercise these spots seem to be less pigmented less lip colored like how tiny scars might look [ Disease ] low immunity with hormonal changes to some extent can cause these symptoms as all your tests are negative you should not be worried anxiety also is a contributing factor de stress yourself yoga and meditation can help