Final answer:
The OTR should implement cognitive behavioral therapy (CBT) to help the client reduce pain symptoms.
Step-by-step explanation:
Cognitive behavioral therapy is a type of therapy that helps individuals change their thoughts and behaviors related to pain. It teaches them coping mechanisms and relaxation techniques to manage their pain better. CBT has been found to be effective in reducing pain and improving daily functioning for individuals with chronic pain conditions like fibromyalgia.