The pain is constant, as in stage one, and throbbing, burning, aching, crushing in nature and is exacerbated by any stimuli. Pan and stiffness persists. Muscle wasting may begin. Patients may start to repeat themselves when having normal conversations. Pain can increase or decrease, depending on the person, and the 'RSDS' may spread to other parts of the body.
Skin becomes cool, thin, shiny.
Not all agree on the existence of a fourth stage. Basically, it is two years or more post-onset. Always be willing to learn from your doctor and share with them new information on 'RSDS' as you recieve it. Use good posture when you are sitting, get up and stretch when you need to. Keep a journal.