I don't. I have problems with smell and odors they seem to make my breathing worse. doesn't matter if it is a pleasant smell like perfume or flowers, or if it is bad exhaust they make it hard for me to breathe.
Though some people it does not bother and use them to help calm down.
Just thought I would chime in and let you know a why not. If it helps you use it. we are all different. Breathe Ez.....

I can't use essential oils either. All odors and aromas bother me and cause me to cough. I was at the supermarket this afternoon and had a terrible time finishing my shopping because of the various odors that caused me to cough non-stop. It was quite embarrassing. I was wishing that I had ordered home delivery.

I use a diffuser withEucalyptus and Peppermint. Works great!

I also have trouble with any essentials oils etc. Irritates my breathing.