Hello! I've been box dying my hair for years. I almost always use the same brand. This time, when I dyed my hair, i got a horrible reaction on my ears. They're swollen, red and very itchy, and have been this way for several days now. Why did I have a reaction to the dye this time, but not in the past? Was it because I used a different, darker color than I normally would use? What can I do to soothe the irritation? Thanks!