During a Raynaud’s attack, the tiny blood vessels that supply the hands and feet narrow on exposure to cold, limiting circulation in the hands and feet. The hands and feet turn white, and eventually take on a blue tinge. Less commonly, the earlobes, lips and tongue can be affected too.
This usually happens in response to cold temperatures. Running your hands under a cold tap, or going out in even mildly cold weather, can trigger symptoms.
More information for parents and visitors on Raynaud’s phenomenon