Dunno - and maybe they are all different. I've been looking for a while for a place/person who specialized in healing abused folks so that it would work better for me. She incorporates all modailities and had the oil ready just incase - and did use it on my feet. She said i could remove as much or as little as I felt comfortable with (i probably already said that somewhere). She also said to email her if anything comes up for me (which it is - I totally feel ill like I'm going to throw up). My plan is to stick with this the best that I can - finally move though a lot of the stuff that is holding me back.