article_snippet: During an attack, the extremities become first white and dead looking and may then turn blue and finally red and burning when the blood flow is restored.
article_snippet: During an attack, the extremities become first white and dead looking and may then turn blue and finally red and burning when the blood flow is restored .
article_snippet: Then, as the blood flow returns, they turn blue and eventually red, accompanied by a burning sensation.
highlights_snippet: During an attack, extremities can turn white, blue and then red .
  