Stage 1
Characterized by intense, burning pain at the site of injury. Muscle spasms, joint stiffness, swelling, restricted mobility, vasospasms, rapid nail, and hair growth, decrease in temperature and decreased range of motion have all been reported. This has also been called “wet CRPS” as some patients may experience increased sweating. For a few lucky patients, this stage may last for a few weeks and then resolve on its own. For the unlucky majority, it progresses.
Stage 2
Characterized by even more intense pain, described by some as similar to the sensation of burning alive or being burned with a blowtorch. Hair growth is inhibited; swelling spreads; osteoporosis becomes severe; nails may crack, pit, grooved, or have spots on them; joints tend to thicken, and the muscles will atrophy or shrink, causing the affected limb to appear thinner than the other.
Stage 3
Characterized by permanent changes in the skin and bones, while the pain becomes even more intense and now may involve the entire limb. Flexor tendon contractions may be present causing the limb or appendage to contract (much like a claw). The symptoms may spread to any other body part, for example, the optic nerves or the digestive system.