Conversation: The conversation between human and AI assistant.
[|Human|] I recently attempted to donate blood at a Red Cross blood drive but was advised not to donate when my blood pressure registered at 80/50. My readings are normally around 108/70 or within two to three degrees within this range. What causes low blood pressure and are there any symptons?
[|AI|]  Hilow blood pressure can cause generalized weakness, myalgic, nausea, giddiness, black-outs, cool feet and hands due to inadequate blood supply. Many cardiac problems also lead to sudden hypotension, vasovagal, syncopal attacks, if present since longer duration should be evaluated. Postural variation & severe infections can also lead to hypotension. Good intake of fluids and nutrition will correct the hypotension many a times. For the sake of blood donation you require mean arterial pressure between 70--110 mm of Hg. all the best, take care.