Transgender or “trans” means that a person’s gender identity or expression differs from what’s usually associated with the sex they were assigned at birth. In other words, how you look on the outside does not match with what you feel on the inside.
In some cases, transgender people will experience gender dysphoria, a feeling of psychological distress that comes from the mismatch between one’s gender identity and their sex assigned at birth. Sometimes this feeling goes away after puberty; other times this feeling only appears in adulthood. Some say it feels like they’ve been born into the wrong gender or the wrong body.