How to check blood pressure: Dr. Moalemi explains when and how to check blood pressure. The best time to check your blood pressure is in the morning when you wake up and when you go to bed. Bedtime blood pressure should be lower than your morning blood pressure. You can buy a blood pressure machine at your local pharmacy, one that wraps around your arm or wrist. Do not talk when taking blood pressure, don’t be anxious and don’t check within 30 mins of consuming alcohol or caffeine. Try to get into the habit of check your blood pressure 2-3 times a week!