 [ 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 ] hi found you this info it could be this exercise induced urticaria is a condition that causes hives and other allergic symptoms it can occur during or after exercise hives or welts are usually raised flat bumps on the skin that are more red around the edge than in the middle hives may also look like red spots blotches or blisters they can occur on any part of the body if so i would see your doctor good luck