I am so sorry to hear that you must work with individuals who are so inconsiderate. As one who suffers from multiple chemical sensitivity, I was literally forced out of the workplace because I could no longer tolerate the chemicals where I worked (construction industry).
People truly do not have a clue how devasting the scent of a synthetic perfume or hairspray can be to those of us who cannot tolerate these toxins. I'd like to send your co-worker a report on the toxins she is exposing herself to by using these synthetic products on her skin. Maybe then she would pay attention!
Now as a bit of comic relief, perhaps you could purchase a gas mask at the local army surplus store and wear it in to the office. Perhaps that would get your point across ;o).
One option that might work for you, would be to use an aromatherapy diffuser. I would recommend that you use only therapeutic essential oils so as to not further exacerbate your problem. Cheap aromatherapy oils will not be effective.
I would recommend using lemon, geranium, sandalwood or marjoram. I use a great little diffuser that is electric and about the size of an ostrich egg. You place a few drops of oil on a cotton pad and the diffuser fills the air with a healthy scent.
Another suggestion would be to consider doing a colon and liver cleanse. I have found that cleansing helps to eliminate the toxins which cause the sensitivity and cleansing also helps to keep my immune system healthy.
I hope this helps and if you have any questions, please feel free to contact me. I'd be happy to help you determine what products would benefit you the most.
Be well,
kathy browning