What causes blood pressure to rise at 9 p.m.

9 o'clock in the evening blood pressure rise may be due to sympathetic nerve excitability increased, improper medication, sleep apnea syndrome and other reasons.

1. Sympathetic nerve excitability increased

If the night emotional excitement or in a state of mental stress, sympathetic nerve excitability will increase, blood flow will accelerate, blood pressure levels will also rise.

2. Improper medication

If taking nifedipine sustained release tablets, amlodipine maleate tablets, felodipine sustained release tablets and other antihypertensive drugs dose is insufficient, before 9 o'clock the drug will be completely metabolized, at this time blood pressure levels will return to high phenomenon.

3. Sleep apnea syndrome occurs during

sleep after the collapse of the upper airway, obstruction, the body will occur intermittent hypoxia, at this time can appear reflex stimulation vasoconstriction to improve local hypoxia, so it will also cause hypertension.