Duration is from 3-12 months from onset. Stage III or late RSDS 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. Films show 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.