The causes of high blood pressure in the morning are not only normal physiological conditions, but also endocrine disorders, drug metabolism and other reasons. 1. Normal physiological conditions: human blood pressure has two peaks in a day, one of which is the peak of the morning around 7:00 to 9:00 am. This is due to the morning after the body began to function, especially the sympathetic nerve, sympathetic plexus static to active, will cause the heart rate to accelerate, the heart pumping accelerated, the amount of blood into the blood vessels and the number of times to meet the active needs of the body, and thus the blood pressure will also be relatively high. 2. Endocrine disorders: If the patient has endocrine disorders, when waking up from sleep, the hormones secreted by the body, such as adrenaline, norepinephrine, prostaglandins, etc., will be secreted in larger quantities than those secreted during sleep, and fluctuate, which will stimulate vasoconstriction of the blood vessels and increase the pressure of the blood vessels, and thus lead to the rise of blood pressure in the morning. 3. Drug metabolism: If the patient suffers from hypertension, the morning rise in blood pressure is considered to be the drug metabolized and decomposed in the body, the drug concentration in the morning of the next day has been reduced, and can not play a role in lowering the effectiveness of vascular tension, which led to the symptoms mentioned above. When patients have high blood pressure in the morning, don’t take a chance, it is recommended to monitor the blood pressure at the same time on non-same day continuously, when there is a continuous rise in blood pressure, it is recommended to use antihypertensive drugs to control the blood pressure under the guidance of the doctor.