Sorry, I didn't mean to imply to bring a heating pad, but if heat helps there are other ways to use warmth without an electric heating pad. There are patches and creams, hot tubs, or someone mentioned borrowing/renting from
DCL. I was just throwing out suggestions of various other therapies. While you said only weed helps, it also sounds like a fairly new condition and she may not have fully tried all the various other relief methods. What works for her may depend on whether she has osteoarthritis or rheumatoid arthritis, and the location of her pain (i.e. knees, shoulders, hands, etc.). It will be an ongoing journey with a progressive disease; willingness to try different measures early may help down the road.