my son anirudh is 20 years old.he was a breach baby forcep delivery.he had injury in the head and neck during birth.his growth was normal but when he was 8 years old we noticed that his left torticolis muscle was tight. when he was 11 years old, dr. dholkia operated to release and loosen the torticolis muscle and his growth was normal. later, he had a bout of tichs which receded all by itself.he is an intelligent kid and he got admission in mnit jaipur for bachelors degree in engineering. there has been increased activity for the last 18 months as he is staying in boarding.he has lost 20kg weight during the last 18 months. he plays tennis and does 15 minutes workout in gym.
lately, he is experiencing his body's involuntary shivering since september 06.the frequency of shivering is twice or thrice a week for a minute or two, mild in nature. he has noticed that the shivering starts when he is having a hot drink like tea or milk. kindly diagnose the symptoms and advice the cure.