The reasons for the rise in blood pressure at five or six o’clock in the morning include physiological conditions, medication and diseases. 1. Physiological situation: normal blood pressure fluctuation is aryl blood pressure fluctuation, that is, waking up in the morning blood pressure value belongs to the highest value of the day, if in the normal range, is the normal physiological situation. If there is a late night, excessive pressure, nightmares may appear early morning high blood pressure. 2. Drug reasons: hypertension, if you are taking short-acting antihypertensive drugs, the antihypertensive effect can not cover the nighttime blood pressure, will appear in the morning when you wake up morning blood pressure increases. 3. Disease causes: If you are diagnosed with hypertension, your blood pressure will increase at other times of the day in addition to the morning. Another sleep apnea syndrome can lead to increased blood pressure in the morning. If you have high blood pressure, you should seek medical attention and medication should be used under the guidance of a physician.