There are 3 stages of CRPS. Stage 1 lasts about 1-3 months and consists of Severe burning or aching that can be exacerbated by a light touch or breeze, Fluctuations on skin temperature from hot to cold, Increased growth of hair and nails, Muscle spasms and joint pain, Increased sweating, Changes in skin color, appearance and texture. Stage 2 is between 3 and 6 months with an increase of symptoms of stage 1. Nails may become brittle and cracked while joints stiffen and muscles weaken. If it progresses to stage 3 without treatment, the limb may be too painful to move and possible irreparable damage.