A blood pressure of 125/65mmHg is normal for a 17 year old.
The normal range of blood pressure is 90-139mmHg for systolic blood pressure and 60-89mmHg for diastolic blood pressure, and blood pressure of 125/65mmHg belongs to the normal range of blood pressure purely in terms of blood pressure values.
Clinically, it is usually not possible to determine whether the blood pressure is normal or not by the blood pressure value obtained from one measurement, and it is necessary to carry out several measurements. If the systolic blood pressure is ≥140mmHg and/or diastolic blood pressure is ≥90mmHg in three or more measurements on a non-same day, then the diagnosis of hypertensive disease can be made.
If a 17-year-old adolescent develops hypertension, mostly secondary hypertension, including multiple aortitis involving the renal arteries, resulting in renal artery stenosis, he or she needs to go to a hypertension specialist clinic at the first time to further clarify the relevant diagnosis.