Complex Regional Pain Syndrome (CRPS) is a chronic pain condition that typically affects an arm or leg, characterized by intense pain and changes in skin color and temperature.

Fibromyalgia is a chronic condition characterized by widespread pain, fatigue, and tenderness in the muscles and soft tissues.

Rheumatoid arthritis is a chronic autoimmune disease causing inflammation and pain in the joints.

Acute Intermittent Porphyria (AIP) is a rare genetic disorder causing intermittent attacks of abdominal pain and neurological symptoms.