Headache after blood donation is mainly due to transient insufficient cerebral blood supply caused by reduced blood volume, which further leads to cerebral ischemia and headache. In clinical practice, we should monitor the blood pressure in time, and if the blood pressure is too low, we can make the blood pressure rise by replenishing fluids, especially intravenous fluids, and at the same time, the headache symptoms will be relieved obviously. Don’t be too alarmed about headache after blood donation, you should drink a small amount of warm water in time, supplement some vitamins and other ways, especially eat more energy-rich porridge, such as jujube porridge, this way can also be on the body’s blood volume, as well as the headache symptoms have been relieved. For blood donation headache there is also a possibility of vascular spasm, caused by tension, so pay attention to rest after the symptoms will also appear to slow down.