How do I read the numbers from a 24-hour blood pressure monitor?
A 24-hour blood pressure (BP) report is normal when the average daytime reading is below 135/85 mm Hg and the average night-time (asleep) reading is below 120/70 mm Hg, with a 10–20 % dip at night. Values above these cut-offs—or a night-time dip under 10 %—suggest hypertension that needs follow-up. Extremely high peaks (for example ≥180 systolic) require urgent medical review.