Is 133/60 is high blood pressure for a 13 yo kid? and how to treat it momentarily anyway

High systolic presur: 133/60 is a bit high on the systolic pressure but normal for the diastolic. If this is persistent through several readings at different times /day, i would do a no salt added diet and avoid any salty foods like pickles or chips. A scheduled office visit to explore any causes is reasonable & i would do some basic testing.

Systolic : Systolic BP elevated, i would wonder if teen is big & BP cuff too small for his arm was used, it would give falsely high reading. If the teen had ingested an energy drink/caffeinated beverage prior to the reading, the systolic reading would be falsely high. If these are present, i would suggest abstaining from these substances, & repeating measurement with appropriate size cuff, no caffeine.