DSM is the diagnostic system of psychiatry, currently in its 5th revision. This podcast discusses why it is mostly false scientifically, and why it is important to change it.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3799243/
https://journals.sagepub.com/doi/10.1177/0004867413519504
https://www.psychiatrictimes.com/view/requiem-dsm