Older adults with low blood pressure in the morning and high blood pressure in the afternoon can be treated with lifestyle interventions and, if necessary, medications such as captopril and nifedipine. Usually, normal adults in the quiet state, the measured blood pressure value is 120/90mmhg, if three non-same day, the average value of the blood pressure measured in the resting state ≥ 140/90mmhg after the diagnosis of hypertension. Low blood pressure in the morning and high blood pressure in the afternoon may be caused by unsatisfactory blood pressure control. If the average of three non-same-day blood pressure measurements is <160/100 mmhg and there is no other accompanying disease, it can be treated with lifestyle interventions, such as reducing sodium and fat intake, quitting smoking and limiting alcohol. If the average value of three non-same-day blood pressure measurements is above 160/100mmhg, the elderly can take short-acting antihypertensive drugs, such as captopril and nifedipine, in the afternoon of each day, as prescribed by the doctor, which can effectively control the blood pressure within the ideal range. If the above symptoms occur, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor to take medication for standardized treatment.