I am blue: a toddler's Raynaud's phenomenon.

Raynaud's phenomenon (RP) is a well-known disorder of self-limiting paroxysmal vasospasms occurring in small arteries of the digits, in the order of skin pallor (white), followed by cyanosis (blue), ending with hyperemia (red). These designative triphasic colour changes with exposure to cold, or emotional response is diagnostic in adults. RP is a very rare phenomenon in the young paediatric population as noted by Nigrovic et al with 123 patients <19 year old in a large children's centre over 10 years and only 4 patients being <2 years old, with 69% of these being primary RP. To our knowledge, this is the youngest documented case of Raynaud's disease that has not required treatment.