Though usually it is said that blood pressure is caused by stress not every stress causes similar way of Hypertension (High BP) or Hypotension (Low BP)
Blood Pressure is based on two metrics – Systolic and Diastolic.
For example Anxiety is related to Systolic pressure whereas Assertiveness and Interpersonal conflict is more related to Diastolic.
Common techniques would reduce stress in general.
But we study each patient and his / her stress and other factors such as suppression and use different forms of relation techniques / stress management tailored to every individual.