People recall what they've experienced in different ways.
I find my change, like a little bit of hair loss while combing hair, which is natural - I didn't feel any pain - but knowing with certainty that some part of myself is gone forever. That is the moment I found that I am still who I am but no longer the same person I used to be.
I think a current self is a product, which is accumulated and socialized. The process of accumulation and transformation repeats constantly.