Describe the biological bases of self-injurious behavior (cutting), and possible treatments for it, and discuss (in detail) the biological underpinnings of the treatment approach.

Describe the biological bases of self-injurious behavior (cutting), and possible treatments for it, and discuss (in detail) the biological underpinnings of the treatment approach. I want to know how the biological underpinnings of pain and pleasure relate to self-harm among adolescents. In this paper please talk about the amygdala, the reward system, and pain regulation.
Here are some references I found so far.
1. Millard, C. (2013). Making the cut: the production of ‘self-harm’in post-1945 Anglo-Saxon psychiatry. History of the Human Sciences, 26(2), 126-150.
2. Edmondson, A. J., Brennan, C. A., & House, A. O. (2016). Non-suicidal reasons for self-harm: A systematic review of self-reported accounts. Journal of affective disorders, 191, 109-117.
3.
OYMAK. (2019). SELF HARM BEHAVOIR. Journal of Scientific Perspectives, 3(5), 81–86. https://doi.org/10.26900/jsp.3.047
4. Gavcar, E. G., Başay, B. K., Avci, E., & Başay, Ö. (2022). Relationship between saliva opiorphin levels, pain threshold, and cutting number in adolescents with non suicidal self injury. Journal of Psychiatric Research.