In this episode, Dr. Christian Schmahl from Heidelberg University and Mannheim, Germany, answers a listener's question and talks about his experimental research assessing how seeing blood affects heart rate and arousal among both those who engage in nonsuicidal self-injury (NSSI) and those who don't. He also shares insights into the role of self and blood in ritual and nonritual self-injury, including examples from different cultures about how they may interpret blood differently in the context of self-harm and even trance-like states.

To learn more about Dr. Schmahl and his work, visit here. To stay up-to-date on next year's ISSS conference in Stockholm, Sweden (Wed-Fri June 24-26, 2026), visit https://www.itriples.org/conferences. Below are a few papers referenced in today's episode:

Glenn, C. R., & Klonsky, E. D. (2010). The role of seeing blood in non-suicidal self-injury. Journal of Clinical Psychology, 66(4), 466-473.
Naoum, J., Reitz, S., Krause-Utz, A., Kleindienst, N., Willis, F., Kuniss, S., Baumgartner, Ulf, Mancke, F., Treede, R.-D., & Schmahl, C. (2016). The role of seeing blood in non-suicidal self-injury in female patients with borderline personality disorder. Psychiatry Research, 246, 676-682.
Stacy, S. E., Pepper, C. M., Clapp, J. D., & Reyna, A. H. (2022). The effects of blood in self-injurious cutting: Positive and negative affect regulation. Journal of Clinical Psychology, 78(5), 926-937.
Hornbacher, A., Sax, W., Naoum, J., & Schmahl, C. (2023). The role of self and blood in ritual and nonritual self-injury. In E.E. Lloyd-Richardson, I. Baetens, & J. Whitlock (Eds.), The Oxford handbook of nonsuicidal self-injury (pp. 468-480). Oxford University Press.

Follow Dr. Westers on Instagram and Twitter/X (@DocWesters). To join ISSS, visit itriples.org and follow ISSS on Facebook and Twitter/X (@ITripleS).

The Psychology of Self-Injury podcast has been rated as one of the "10 Best Self Harm Podcasts" and "20 Best Clinical Psychology Podcasts" by Feedspot and one of the Top 100 Psychology Podcasts by Goodpods. It has also been featured in Audible's "Best Mental Health Podcasts to Defy Stigma and Begin to Heal."