If that's the problems you have, I would say it won't be easy for you to do everything man.
Math is a need, and especially in what you are dealing with!
Maybe your body is very reactive to some components and it's the reaction you get.
See if it doesn't goes away for some time and then if not, it's an acne. If not, just a little reaction over some products, happens sometimes.
Never assume, your body is so complex, you can't take anything as granted.
Check the doctor and you have to get your blood work done. Assuming is just assuming, not being SURE about it.