Inclusion Criteria:

1. Diagnosed with any chronic musculoskeletal pain (≥ three months in duration) including back, neck, limb or pelvic pain, tension headache and fibromyalgia;
2. Treated with medical Cannabis;
3. Physical and mental ability to participate in group discussions;
4. Fluent in reading and speaking Hebrew.

Exclusion Criteria:

1. Chronic pain conditions not classified as chronic primary pain. These include neuropathies such as carpal or tarsal tunnel syndrome, radiculopathy, and neuralgia;
2. Primary headache disorders such as cluster headaches;
3. Cancer-related pain;
4. Burn- or infection-related chronic pain;
5. Autoimmune diseases typically associated with pain, including rheumatoid arthritis, multiple sclerosis, inflammatory bowel disease, systemic lupus erythematosus, and sickle cell disease;
6. Inflammatory systemic diseases causing pain, including osteoarthritis or gout.
7. Severe mental illness or psychiatric disorder such as schizophrenia, bipolar I disorder, multiple personality disorder, or dissociative identity disorder not controlled with medications, active suicide or violence risk in the past year, active severe alcohol or substance use disorder, self-reported use of intravenous drugs.
8. Participant with a significant negative life event within the past six months, such as the death of a close person, significant loss of income, or another traumatic or highly stressful event, which may substantially affect the participant's emotional state, safety, or ability to participate in the intervention;
9. Current participation in another psychological or behavioral therapy, program, or clinical study.