What are the treatments for complex regional pain syndrome?

I- Rehabilitation treatment aims to maintain limb mobility, avoiding stiffness and muscle contracture associated with pain and reducing edema.
II- Hyperbaric chamber.
III- Analgesics and nonsteroidal anti-inflammatory drugs (NSAIDs) are used to treat pain. Morphine and derivatives are used for severe pain.
IV- Tricyclic antidepressants (amitriptyline) are useful in all phases of this disease, especially if the pain is constant.