Strong odors can cause exacerbations for some people. It's not dangerous in and of itself, but if you are one of those who reacts to strong odors, it can trigger a bad exacerbation, and that is dangerous. You'll have to do a little experimenting to see if you react badly to those kinds of things and act accordingly.

i have recently bleached my wife's roots and that was ok for me, if you really want to color your hair i would recommend wearing a mask over your nose and mouth and making sure the room you are having it done in is well ventilated, if you are thinking of having it done in a hair salon, well i would not recommend this as ventilation is generally not great, and the air full of strong smells from peroxide hair coloring and hair spray, further more they probably would not be prepared to work on you while you are wearing a protective mask.
All the best
Barrie

Cleaning products, sure spike my COPD - have to be very careeeful. I would think you need to stay away from anything that you have a reaction to, it's telling you "No"

I just colored my hair. it's been a while. I opened the window and continued. everything workeed out fine although I was tired at the end. I feel it was worth it.

I color mine and i have never had a problem. I think it would depend on how sensitive you are to the fumes. Have a professional do it or have someone with you the first time you do it.....just in case.