[Complex regional pain syndrome].

The Complex Regional Pain Syndrome (previously algodystrophy) is a rare affliction that usually affects a distal extremity (hand, foot). It occurs most frequently within weeks following a traumatic injury or stroke. It is a syndromic entity whose diagnosis is based on precise criteria, known as the Budapest criteria, excluding any disease that better explains the symptoms. The treatment must be given early. Functional restoration (physiotherapy, occupational therapy) is at the heart of the treatment, along with psychoeducation. Inappropriate disuse and avoidance, often encountered, must be combated. Bisphosphonates or steroids are first-line drugs at early stages. The evolution is often long, but the prognosis is favorable in about 75 % of cases (≤ 1 year).