So, I'm 17 years old lad with a very active, sporty lifestyle. My problem is that I get countless small and tiny red bumps all over my body, mainly on my arms, stomach and chest and some on the legs after I do something like push ups or pull ups. The worst is during/after a run because thats when these bumps appear the most. Just before I'm about to get them, I feel like a burning sensation around my neck and after a couple seconds they burst out almost immediately on my body. However, they are not itchy, I just feel that burning sensation. I have this problem for about 6 months and I have never had anything like this before in my life. I've tried some eczema and anti-allergy creams but had very little progress so far. It's really annoying and embarassing. I have tried searching up the internet what could it be but I haven't found anything similar to my case. Could you please help me out?