My late wife, in her last months, required oxygen to maintain her balanced emotional and cognitive processes. Sometimes the flow was a bit ‘off.’ When I mentioned what she was going through to a nurse friend of hers - a psychiatric nurse - she came right over. Within about three sentences, she had my beautiful wife settled, calmed and peaceful.
My point? How you approach someone in the midst of emotional upset or turmoil can change the entire situation INSTANTLY.
It's not that your teenager is anywhere close to that but if you change your approach and your response you can instantly change their reaction and help the entire situation to improve, not worsen by ‘fanning the flames’ even higher.
As in so many difficult circumstances, PAUSE, then say something supportive or information-querying.