any time you lighten hair you have to use a developer. bleach almost always comes in powder form, which always takes my breath away when i use it. i try to turn my head. some are "dust free" and paul mitchell has a "lighten up" cream bleach, but you still have to mix it with the developer. the developers come in different volumes or strengths. the higher the number the stronger the lift. even to just deposit color, ie go darker, you have to use a developer. i have always had sinus issues before i started doing color, and i am dealing with some sinusitus now, but, i really think it is from the pollen. i really think it is one of those things that affects everyone differently. oh, and our perms smell like the dump, thankfully, no one really gets those anymore. i would love to change careers though. for more reasons than the chemicals. hah!