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You mentioned that you have noticed pressure in fingertips on left hand and both hands are cold
, I do not think that it is because of blood pressure. But, may be due to neuropathy or Raynaud's syndrome or may also be due to hormonal
imbalance or side effect of medicine. However, Physical examination is mandatory to assess this. Hope I have answered your query. Let me know if you have have any clarifications.
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Wish you good health!