Blood donation by people with high blood pressure is not beneficial, and may even cause sudden illnesses such as heart attack and cerebral ischemia in the donor, and may also cause adverse consequences such as a sudden drop in blood pressure in the recipient during blood transfusion. Patients with high blood pressure may experience fluctuations in blood pressure when donating blood due to a sudden drop in blood volume. Some patients with arterial stenosis, such as coronary heart disease, hypertension, cerebrovascular disease, etc., may suffer from heart attack, cerebral ischemia, secondary arrhythmia, etc., which may cause certain harm to themselves, and may even be life-threatening when it is serious, as a result of the sudden drop in blood volume after blood donation. And patients with high blood pressure have been taking antihypertensive drugs for a long time, and the blood may contain certain components of antihypertensive drugs. If the recipient of the blood belongs to the group of people with low blood pressure, surgery, trauma, etc., it may be due to a sudden drop in blood pressure, which may cause some harm to the recipient. Therefore, it is not beneficial for people with high blood pressure to donate blood. And it can cause some harm to their own or others’ bodies, and blood donation is not recommended.