Hello Welcome to HCM He is showing symptoms like strange behaviour, irregular meals, like to stay alone at home or decreased sociality. He is also talking to self or muttering most probably. He has tendencies to harm self or others and is short tempered. As per my opinion these symptoms should not be overlooked and need proper consultation of psychiatrist. Such type of symptoms can occur due to some psychotic episode. Even early stages of schizophrenia can be one possibility. There is urgent need for treatment. Treatment in form of antipsychotics like Olanzapine, Haloperidon, Risperidone, Qutiapine etc is needed in psychosis. Proper family support to patient is necessary for better results. Thanks, hope this helps you