Ambulatory blood pressure refers to a pocket blood pressure monitor that stores signals and data digitally and monitors blood pressure continuously for up to 24 hours is called ambulatory blood pressure. The cost of ambulatory blood pressure monitoring in a general tertiary care hospital is about 200 yuan. The following groups of people are suitable for ambulatory blood pressure: First, patients with unstable blood pressure. Second, “in-office hypertensive patients” with low risk factors. Third, patients with intractable hypertension and trigger hypertension. Ambulatory blood pressure monitoring time is generally, selected 8-9 a.m., just 8-9 a.m. On the day of testing, small traumas such as blood sampling should be avoided on the dorsal limb to avoid bruising and infection.