Hmm, just try some really thick wrist straps and do them up reasonably tight, like a couple wraps around your wrist then a single wrap on the bar to keep it tight. Make sure your form is good on lifts that bend the wrist a bit eg don't bend your wrists back to far under the bar when benching etc, try to keep them from being over pressured. If it's not form oriented you may have damage and need to get it looked at.
Is there any lifts you get pain on in particular?