I think some people are more sensitive and I am for sure one of those. No perfume for me. I would think if you had allergies too that could irritate your system which then could have other side effects. Someone has posted to me about the pans I use maybe causing symptoms so even looking at things like that.I have not tried chemical free but I would think a place like Whole food or Trader joes may carry. I just try to stick away from things with strong odors.Good luck.