Recently I realized that an old scar of mine was getting red and puffy. It doesn't hurt, but I would like to know why this is happening. Keep in mind, I'm not allergic to anything. Also, upon seeing this new looking scar, I realized I have red dots scattered around my body and for some reason, there are a lot on my right elbow. These dots don't hurt either but it's just weird and if someone could tell me what's going on that'd be great! Thanks!