I have found that crochet doesn't cause as much pain as other craft activities I have tried. I can't crochet for great lengths of time though and have to have regular breaks from it and tend to do a little then do a little of something else and then come back to it. Over time I did find that crocheting even when taking breaks caused great pain in my little finger and ring finger. I worked out that it was the way I held the hook and had little option for a different hold with the normal hooks.
I did some research and fund these wonderful hooks...The design works perfectly for me and the pain in my fingers has improved considerably :)