The 17-year-old child high blood pressure should first be diagnosed except secondary hypertension factors, for the cause of the treatment, if there is no clear secondary factors, you can eat a balanced diet, eat fresh fruits and vegetables, as well as control sodium intake, so as to regulate. At the same time need with sports exercise, maintain normal body weight, regular routine, if life management can not alleviate the symptoms need to take oral antihypertensive drugs treatment. If the patient has high blood pressure, first of all need to improve the examination under the guidance of the doctor to clarify the cause of hypertension, part of the high blood pressure may be caused by other diseases, through the treatment of the primary disease so that the blood pressure level can be controlled. Most of the elevated blood pressure can not find a clear cause, known as primary hypertension, need to be through life management, drug treatment and other ways of comprehensive treatment. Patients can eat a balanced diet rich in vitamins and fiber-rich fruits and vegetables, and increase the intake of dietary potassium while reducing the intake of sodium components. If physically possible, proper exercise, maintaining a normal weight, reducing late nights and keeping a regular routine are all conducive to relieving the symptoms of high blood pressure. If the above ways, can not control the symptoms of high blood pressure, and the blood pressure continues to rise, then you need to take oral antihypertensive drugs under the guidance of a doctor, such as nifedipine, benidipine, irbesartan, etc., or oral hydrochlorothiazide, furosemide, etc., after the medication, you can control the blood pressure and improve the symptoms. If a 17-year-old child has high blood pressure, he or she needs to go to a regular hospital, have a relevant examination, and take relevant treatment measures under the guidance of the doctor.