He didn’t have any mental issues before. Yes, he is now being disgusting just for the sake of being disgusting, but what caused this and how to stop it?
In all honesty, I don’t know your cousin and I’m not qualified to answer that. He needs a doctor or therapist. Sadly, there’s not much you can do other than not abandon him. Unless he is willing to making changes and work on himself you cannot force it on him.
He didn’t have any mental issues before. Yes, he is now being disgusting just for the sake of being disgusting, but what caused this and how to stop it?
In all honesty, I don’t know your cousin and I’m not qualified to answer that. He needs a doctor or therapist. Sadly, there’s not much you can do other than not abandon him. Unless he is willing to making changes and work on himself you cannot force it on him.