Some people may experience a drop in blood pressure for a short period of time after donating blood, but this cannot be sustained, especially in patients with high blood pressure, which will return to its previous level after rest and dietary supplements.
After blood donation, the body’s blood volume decreases and the pressure exerted by the blood on the walls of the blood vessels decreases, so in theory there may be a short-lived decrease in blood pressure. However, not everyone will experience a decrease in blood pressure. Most normal people with good blood vessel elasticity will experience a change in blood volume of 200 to 400 ml, which can be self-adjusted and will not trigger a change in blood pressure.
Some patients with high blood pressure may experience a short period of lower blood pressure after donating blood. With dietary supplements and reasonable rest, the blood volume will return to normal, and the blood pressure will return to the level before donating blood.
Blood donation to lower blood pressure does not have a clear etiological scientific basis, and can not be used as a means of treatment of hypertension, patients should consult a doctor in a timely manner, follow the doctor’s instructions for scientific and standardized treatment.