I am a chapstick aholic! But if i use any other different brand than blistex lip medex, my lips break out in little red painful bumps! WHY! For years i used only the black medicated chapstick brand and just one day i couldnt use it anymore and got the bumps. tried every chapstick and then the medex just stuck and it made them go away. now when i try a different brand, i get the bumps...every...time. it's annoying because when i run out of the medex i have all these other chapsticks lying around i could use but no. and the medex isn't exactly that cheap for chapstick.
is there ANY ideas why this would happen?