My blood pressure now is 153/81 im 17 yrs old what should i do to lower my blood pressure?

Hypertension: To lower bp reduce your weight gradually to ideal level if you're overweight; do not add salt to your foods at the table; avoid tobacco and alcohol and minimize caffeine; exercise regularly and try to avoid stress and anxiety. These measures should help. A home bp measuring kit can help you and your physician monitor your progress.

High for yr age: For some one of your age to have such a high B/P you should first have a workup to find out why you have it. You may have renal artery stenosis which is surgically correctable and thereby corrects the hypertension.