A Raynaud’s attack typically starts at a single digit such as a finger and then spreads to additional fingers on both hands. The thumb isn’t typically affected, but if it is, this can be an indicator of secondary Raynaud’s phenomenon.[1]
What are the early signs of a Raynaud’s attack?
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•Last Updated: April 23, 2025
A Raynaud’s attack usually begins in one finger and can spread to other fingers on both hands, whereas the thumb is generally not affected. If the thumb is involved, it may suggest secondary Raynaud’s phenomenon.