Go on Google and type in Raynauds Phenomenon or Raynauds Syndrome. There is a lot of detailed websites about it and more information. It's best to be diagnosed with Raynauds however incase its secondary Raynauds which is usually caused by Arthritis and I think also Sceloderma.
Raynauds can affect your ears, nose, feet and hands. The affected areas usually become numb with pins and needles and change in colour. It's usually quite painful during a Raynauds attack too (in severe cases). Most people during a Raynauds attack, when their circulation is improving the affected area will become usually red or sometimes even grey and/or blue.
Best to get a referral to a Raynauds specalist to be certain.