So I dyed my hair recently, and I left it on for 30 minutes, like the box said, but my scalp was stinging the entire time. Is this normal?? Has anyone else experienced this pain when they dye their hair. I used loreal excellence, I like the results, but I have used other dye brands before, and always experience the stinging! I'm completely fine now so I don't think it was an allergic reaction. Just wondering if a stinging scalp is normal when dying hair.