The most common medical conditions indicated by the symptoms muscle twitching (painless), numbness or tingling and unusual facial expression including Cold ecposure, Asperger syndrome, Facial tic, and Epilepsy (simple partial seizures). As per your post, Cold exposure can produce symptoms which include color changes on the skin, numbness, twitching, stinging, redness, blisters, and more. Do take sum treatment ftom your doctor, or you can consult me on practo. Its treatable.