Yes, Mortons Epsom lotion at walmart. MrsD says only put it where the skin is thin for better absorbtion but if I am having bad muscle cramps I will put it wherever needed along with on my wrists. It really does help muscle aches and pains so I think it does get through some. I am on diuretics so I get muscle spasms if I don't take enough potassium supplements too. (along with magnesium)

I dunno anything about using epsom for constipation, never heard of it.