Duration is 3-12 months from onset. Pain spreads proximally. Although it may diminish in intensity, pain remains a prominent feature. Flare-ups may occur spontaneously. Irreversible tissue damage occurs.
Skin is thin and shiny.
Edema is absent. Contractures may occur. X-ray films indicate marked demineralization. Others, however, dispute the need for an underlying personality disorder. A single, reliable, sensitive, and specific diagnostic test for RSDS is not available.