I am getting cramps under my right ribcage, foot front of shin, neck and they hurt really bad - I drank BIG glasses of water, ate chips in case my salt was down, juice if my sugar was low - I recently had out patient back surgey and the swelling in my feet has gone down almost completely in about 1 week - I was diagnosed as a predictable with arthritis in my lower back - Im eating really good doing acai shakes with real fruit and scoops of Super food, low sodium diet what is going on -