High blood pressure after a shower has been linked to the constriction of blood vessels throughout the body due to the stimulation of cool water. Blood pressure is the pressure of flowing blood against the walls of blood vessels. Blood pressure is related to myocardial contractility, blood volume, vascular resistance and heart rate. 1. Emotional excitement: Emotional excitement or mental tension can increase the heart rate and the contractility of the heart, causing an increase in blood pressure. It is necessary to relax and the blood pressure returns to normal. 2. Cold stimulation: Cold temperature stimulation can cause small blood vessels throughout the body to contract, resulting in increased blood pressure. Therefore, patients with hypertension must pay attention to keeping warm, especially in winter, and avoid getting cold, including cold water rinses and so on. 3. Strenuous exercise: When strenuous exercise, due to the heartbeat acceleration, the heart blood discharge increases, can cause blood pressure rise, usually after rest can return to normal. For hypertensive patients, we must exercise properly, avoid overload strenuous exercise, so as to avoid the occurrence of cardiovascular and cerebrovascular accidents. 4. Exhaustion, late night: due to overwork or late night, can cause the heart rate to accelerate, resulting in increased blood pressure, through rest can generally return to normal. 5. High sodium salt diet: many hypertensive patients, and high sodium salt diet has a relationship, mainly salt-sensitive hypertension, and blood volume increase has a relationship, so hypertensive patients to low salt diet. Therefore, there are many reasons for elevated blood pressure, usually pay attention to keep warm, avoid cold and cold water stimulation, pay attention to rest, avoid staying up late, low-salt diet, appropriate exercise body.