High blood pressure in children usually doesn't cause symptoms.
When to see a doctor
Unless your child has an underlying health problem, you probably don't need to make a special visit to your child's doctor to have your child's blood pressure checked. However, your child's blood pressure should be checked as part of a routine doctor's appointment, starting when your child is age 3.
If your child has a condition that can increase the risk of high blood pressure — including premature birth, low birth weight, congenital heart disease and certain kidney problems — blood pressure checks may begin during infancy.
If you're concerned about your child having a risk factor for high blood pressure, such as being overweight or obese, talk to your child's doctor. He or she may recommend more frequent blood pressure checks.