7 months ago, after being sick, I had high blood pressure. The doctor said it was essential hypertension. Since then, I have taken medicine every day and maintained a healthy diet as directed by the doctor. However, every few days around 15-17h, blood pressure suddenly rises to 140-150/100, and the other days are normal. After raising blood pressure, I lay still for a long time until the morning when I woke up, my blood pressure returned to normal. Doctor asked me often sudden sudden increase in blood pressure what to do?