For me, I never had any physical trauma (thankfully). It was moreso mental trauma. Trauma from my parents' failed marriage, not feeling like I fit in with my classmates, not feeling like I was ever that good (I never had the best grades in school until college), and all of that dark sh*t was just suppressed in my body for years, and years, and years. I never dealt with it because I was scared of what was gonna happen.
Now, I feel better, and feel more comfortable moving forward - knowing I can properly deal with a negative emotion again.