Hypertension after drinking alcohol blood pressure becomes low generally because alcohol metabolites have a certain vasodilatory effect, increasing the volume of peripheral blood vessels, so that the blood pressure has a certain degree of decline. Hypertension is defined as the presence of high pressure or low pressure out of the normal range in three measurements of blood pressure not taken on the same day. Under normal circumstances, the range of blood pressure is 90 to 140 mmHg for high pressure, and 60 to 90 mmHg for low pressure, and some patients with high blood pressure will experience a decrease in blood pressure about three to four hours after drinking alcohol. Alcohol metabolized by the liver metabolites can act on the vascular smooth muscle, prompting vasodilatation, so that the peripheral vascular volume increases, reducing peripheral circulatory resistance, so the blood pressure will be reduced to a certain extent. However, the decrease in blood pressure in this case is temporary, when the alcohol metabolism is broken down after the blood pressure will return to the original blood pressure value.