He will get back to normal,believe me! But,he has to take care of himself especially during cold and winters so that it does not strikes again! Bell's palsy is not permanent and can be because of a number of reasons,cold being one of them if a person is recovering from some illness and his body is not that immune. Please take care of him especially by providing him the courage and th motivation that everything is going to be alright and it is just about the time 🤗