Hi, my name is Pam, and I am 70, no health problems and I do water aerobics 3 days a week and have for over 12 years. Now my question. What caused severe cramps in the abdomen, and in the inner thigh for no reason. I don't have to be doing anything for them to appear. The ones in the lower trunk area go away with a few deep breaths, but the inner thigh hurts.