Here is a link on more about the soap for pain relief.
http://www.snopes.com/oldwives/legcramp.asp
I was thinking the soap kept the covers from being tucked in too tight...and if the soap goes under the fitted sheet..wouldn't the fumes of the soap be trapped there..and not near your feet..if that is another theory why it works?
If this works for you GREAT! Anything easy is so much better than medicines, rubs, etc.
Now let me slip into my garlic necklace..I hear there are vampires on the loose this month. ha ha ha..
What a fun topic Dawn!
Hugs, Janet