High blood pressure three days after drinking alcohol may be caused by a transient increase in blood pressure, or it may be caused by hypertension. Generally after drinking alcohol in the body forty-eight hours will be metabolized, so three days after drinking high blood pressure is mostly considered to be emotional excitement, nervousness, fear and other factors lead to sympathetic nerve excitation, caused by a transient increase in blood pressure. This is a normal phenomenon, and the symptoms will generally be relieved after the emotions are stabilized. If the patient’s blood pressure is measured three times on non-same days three days after drinking alcohol, and the diastolic blood pressure is ≥90mmHg and/or the systolic blood pressure is ≥140mmHg, it is considered that the increase in blood pressure is caused by hypertension. It is recommended to seek prompt medical attention if the increase in blood pressure occurs three days after drinking alcohol, but if it is a transient increase in blood pressure, no treatment is needed. If the increase in blood pressure is caused by hypertension, you need to choose the appropriate measures under the guidance of the doctor. In addition, patients with increased blood pressure should reduce the amount of alcohol, usually to maintain a relaxed mood, diet to control salt intake.