Answer:
Biofeedback
Step-by-step explanation:
Biofeedback - 
It is a type of technique , involving both mind and body, by using auditory or visual feedback , in order to attain control on the involuntary functions of the body , is referred to as biofeedback. 
This technique require the voluntary control over blood pressure , pain , muscle tension , blood flow and heart rate . 
Hence, from the question, 
The treatment used on the client is the Biofeedback .