Hello and welcome to Healthcare Magic. Thanks for your query. From the limited information which you have provided, your uncle may be having symptoms related to alcohol withdrawal. Suddenly stopping alcohol can result in withdrawal symptoms which can include tremors, increased sweating, palpitation, sleep disturbance, etc. and sometimes even psychiatric problems like seeing or talking to non-existent things, talking or murmuring to self, etc. I would advise you to take him to a psychiatrist for further evaluation and treatment. There are effective medication which can control these withdrawal related effects and control his psychiatric symptoms also. Best wishes, Dr. Sheeba Stephen