Thanks for writing to HCM
Normally blood pressure varies 10-15 mm Hg in systolic value and 5-10 mmHg in diastolic value.
Wide variation, as in your case may be due to poorly controlled hypertension
as blood vessels becomes more reactive and on slight provocation it shoots up.
Other factors like emotional, stress
should also be considered.
So,you take regular medicines and contact your cardiologist for any problem.