I know a few years back I got a doze of cramps in both my hands and legs, but went to my GP. I think it turned out that I was dehydrated. So I was told to drink tonic water (it has something in it that stops cramps) however I also ran out of it, so just drank regular water and sure enough the cramps vanished as a result. When I think back to it at the time I was drinking more tea than water prior which is probably why they showed up in my case. So that may be the same for you too. Its worth a thought.