The Qi follows your mind. If you look for a blockage you will create it. If you look for balance and flow you will create it. Qi follows your thoughts. The more you work with qi the better you become at noticing and directing it.
There is the lab coat effect for blood pressure measurements. There are not external influence that cause this pressure rise. They are created by the persons thoughts.
Master Lin talks about the palms up or palms down depending on how you want to influence blood pressure. He also talks about helping others with the energy fingers sweeping through a person in a heart (valentine style) pattern, either up or down depending on which way they need to go to Return to Normal. "... up to normal" or "... down to normal" at the phrases to use with the gestures. He has mentions this for blood pressure, colesterol, blood sugar.
At the start of a meditation I have visualize Master Lin doing this to me.
Later you learn / realize that you can go into the emptiness very quickly (a second worth of thought). Then you can apply these healings to yourself throughout the day as you note the need or at least benefit of doing it.
You are perfection,
Iam2 
