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This is Dr. David
you could be having vasculitis or spasms of your blood vessels which can cause cold pale hands and also spikes up in your blood pressure
one type of vasculitis is called Raynaulds syndrome.
another one is Giant cell arteritis which can cause headaches in your temporal areas.
you should see a doctor about these potential vasculitis. you may need a biopsy of one of your blood vessels to check for this
there are also blood tests like ESR and C reactive protein which can look for blood vessel inflammation
let me know if you have questions.