I want and need to know blood pressure reading for 7 year old boys to handle it for my son?

Blood pressure : I am not sure of your exact question. Are you asking how to get your seven-year-old son to have a blood pressure reading? The best place to start with your seven-year-old son would be with a consult with your pediatrician. Blood pressure measurement can be obtained at the doctors office with discussion following about what the measurement means.