It’s odd that we change. Years pass, memories of different selves accrue. I think the mind can have a difficult time reconciling those different selves with their varied, contradictory shapes.
I remember having a much stronger sensory awareness when I was a kid. My nose would haunt me, for example. I would smell something unpleasant, and a sense of unease would settle over me for days. I’d grow moody about it, troubled. Sometimes, for reasons I didn’t understand at the time, I would lash out at others well after the triggering scent.