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Raynaud's phenomenon can usually be diagnosed after an examination of your symptoms and some blood tests.
Your GP may place your hands in cold water or cool air to see if you show symptoms of Raynaud’s.
Blood tests can be used to check for other health conditions that could be causing your symptoms. These tests may include:
Further testing is usually recommended to find out whether you have primary or secondary Raynaud’s.
Secondary Raynaud’s may require more treatment and, in some cases, referral to a specialist.
Secondary Raynaud’s may be suspected if:
Your GP or specialist may also check the tiny blood vessels (capillaries) where your nail meets the finger. These capillaries are often larger in people with secondary Raynaud’s, and look like red pen marks.