High and low blood pressure may be related to one’s own exercise, emotional stimulation, and drug taking. 1. Exercise: Everyone’s blood pressure is not static, it fluctuates throughout the day, and the organism will regulate it according to the body’s needs. Blood pressure rises during work activities and gradually falls at night when resting. 2. Emotional influences: When there is a change in mood, blood pressure will also fluctuate. 3. Drugs: When taking short-acting antihypertensive drugs, such as nifedipine tablets, the blood pressure will drop quickly after taking them, but the effect of the drug will subside after a few hours and the blood pressure will rise again. The level of blood pressure is related to a variety of factors. If it fluctuates greatly throughout the day, it is recommended that you consult a doctor in a timely manner for treatment under the guidance of a doctor.