Muscle spasms and the pain after?

I suffered from leg cramps at night and the doctor checked my potium level. I now eat a banana before I go to bed to help with the cramps. A bar of soap under the sheets will also prevent cramps. I don't know how it actually works but it does work. Another great thing that helps with the pain is to get some castor oil and heat it just a little and mage it into the area that is hurting.