One of my close friends is having a behavioural or perosnality change. He used to be polite and civil but these days (since about 10 months) he is very aggresive and mean. He has been recently diagnosed with hypothyroidism and is on medication currently. I do not know if thyroid disorder is causing this or not. We used to discuss a lot of things. We loved to discuss a lot of things. We never had problems. We both were open minded. But nowadays, he ,especially in discussions, is very aggresive. Even if presented with facts or his own previous assertions he become very agitated. He tries to put the blame on others. What is more shocking is that he accepts the evidence and says the evidence supports him even though it contradicts him. This is not a one-time incident. It is happening everytime. We are so exhausted. There is no way for us to compromise either. He comes up with different line of arguments. Even if we decide not to argue on a particular stuff he accepts and immediately comes up with arguments. Literally, anything becomes an argument aggresively. If I make a remark like, "there is too much traffic today", then he immediately picks up and yells at me. He asks, what do you think is a city? don't you know there are traffic jams? Don't be the frog on well. Don't you learn anything ever in your life? Did you ever stepped out of your home? If I apologize. He would accept and again after few minutes or later the same day will send statistics on traffic jams in city and reignite the arguments.
He was not so back then. Is it a problem? Does he need a clinical evaluation? Can anyone guess what is the probelme if any?