Please check if any of these conditions are present, If yes eliminate them:
- Inadequate rest period before measuring BP or in between two measurements. exercise within 30 minutes before blood pressure measurement also affect the reading.
- Body position- Crossing legs, talking, etc. can give false reading.
- Muscle tension while measuring BP (not keeping your arm relaxed)
- Stimuli such as food, alcohol, caffeine, nicotine
Assuming that you and your physician are following all precautions to avoid error in BP reading. You might be showing white coat effect.The best way to know and avoid it is to measure your BP at home, preferably with/ by a person you comfortable with.
And don't forget to inform your physician about your readings, so that your medications can be adjusted accordingly.