Hi Bill, I have them also. There is no rhyme or reason to when I get them. I once got them late one night while playing cards with the boys, hurt so bad my eyes were watering and I ended up going home. Then I have woke up in the morning having them. I call them cramps and asked my doctor about it and I got "it's just one of them things" answer that i seem to of heard a lot in the past few years. I will be curious to any more replies on this also

Joe