PPT Slide
Raynaud's phenomenon is the name given to the temporary interruption of blood supply to the fingers or toes (though occasionally the ears and nose can also be affected), which occurs as a result of spasm of the arteries bringing blood to the fingers etc. It is characterised by a series of changes in the colour of the skin. Typically the finger initially becomes white as blood supply is lost, then blue or dusky, and finally pink as blood flow improves and eventually returns to normal. The sequence is of variable duration and can last from minutes to hours.