Unfortunately, heat is an issue in MS. It exacerbates symptoms in many pts (myself included). I hide in the AC or shade in the summer. But if my neck goes out, I do have to use a heating pad, heat is the only thing that works.

Some waxes will absorb scent better than others, but most of the fragrance oils are formulated for 4-5% concentration. The essential oils are much stronger, but my husband is fixated on sandalwood. I'll probably just add extra and see what happens. I'm going to be a mad scientist