Kat
My mother, who was suffering from fibroids in her uterus for a couple of years (she just got a full histerectomy yesterday!!) was told by her doctor to use moist heat preferable to electric heating pads. So she has used lots of things you can heat up in the microwave, and hot water bottles.
Like Deborah said in the last message, I don't know how bad she would've been if it were not for heat to relax her tight muscles.
Kat*