It's the Holidays, so it's not a matter of "if" Triggers happen, it's a matter of "when". A few techniques are provided from a very recent experience, accompanied by research, resources, and more.
1) The definition of triggers per the American Psychological Association,
https://dictionary.apa.org/trigger, "a stimulus that elicits a reaction. For example, an event could be a trigger for a memory of a past experience and an accompanying state of emotional arousal".
2) Breathing techniques to reduce stress and anxiety YouTube with Andrew Huberman and Tim Ferris.
3) University of The Cumberlands Eco-Therapy Blog on 'Take a Hike', "to improve mental and physical wellbeing through outdoor activities in nature—improves mental and physical well-being when doing outdoor activities in nature. Walking or hiking outside is a great way to reduce stress, anxiety and depression."
4) The NeuroAffective Relational Model™ (NARM), "is a mindfulness-based clinical treatment, as its method is grounded in a phenomenological approach to addressing identity and consciousness of self – who we truly are beneath these patterned ways of relating to ourselves and the world. Seen in this way, healing complex trauma is a vehicle for transformation on a personal and collective level."
5) Affective Perspective-Taking and Anger Regulation in Adolescent Peer and Parent
Conflicts article with the quote mentioned of, "Laursen and Hartl (2015) espoused that positive growth is facilitated by constructive conflicts; conversely, hindered relational, affective, and behavioral adjustment is associated with frequent destructive conflicts."
6) Huberman Lab, look for the Episode entitled, 'Erasing Fear & Trauma'.
7) Brad Reedy Podcasts
8) Dr. Harriet Lerner, and the mentioned book, 'The Dance of Anger'.
9) Step 10, "Continued to take personal inventory and when we were wrong promptly admitted it."

Thank you for listening and please visit www.siblinghoodofrecovery.com for free resources, links to organizations, groups and individuals who can offer help in the Journey of Recovery towards healing from substance use disorders. If you like this Podcast, please leave a rating on wherever you're listening. It will help to get the word out.
If there is one message I can leave you with, the best you can offer your loved one battling addiction is love and a healthier you.
Walk gently, my friend.