A mixed-methods study of 608 people who experienced extended difficulties after psychedelics found that 41.8% linked their challenges to resurfaced childhood trauma. In follow-up interviews, some participants vividly re-lived events, others felt symbolic or bodily echoes, while many reported confusion about whether the memories were real. Outcomes varied: 50% found healing, 28% had mixed effects, and 22% experienced re-traumatization. The authors stress the importance of trauma-informed preparation, safe settings, and robust integration to reduce risks.