When blood pressure rises in cold weather, it is necessary to adjust the dose of antihypertensive drugs and, if necessary, add other antihypertensive drugs with different mechanisms of action for combination therapy. The increase in blood pressure in cold weather is usually due to the involvement of factors such as vasoconstriction and the increase in blood volume due to the decrease in sweating caused by the increase in clothing in cold weather. Therefore, for the increase of blood pressure after cold weather, it is important to pay attention to keeping warm and to improve the therapeutic lifestyle. In addition, water intake and sodium intake should be controlled, and 24-hour stable antihypertensive medication should be given on top of the therapeutic lifestyle improvement. For patients with high basal blood pressure, combination of antihypertensive drugs with different mechanisms of action and drugs for target organ function or organ-related damage can be given.