My Mom used to have a huge sensitivity to perfume - gave her a horrible headache. Bacon used to do the same thing - she couldn't eat it or smell it or she would be in bed for a day.

My sister that just passed away also had chemical sensitivities - she had to use a special brand of face wash, cosmetics, etc. She also could not tolerate perfumes or any kind of scents (candles, room fresheners, etc.).

Myself and my other sister have no reaction to scents - we both use perfume (although sparingly - heavy scents make me nauseous) and other scents don't seem to bother us.