Showering (I shower in the dark now), seeing my torso from diagonal or the side, sometimes seeing flat chests (it reminds me that mine isn't like that), moving in a way that I accidentally brush my arm against my chest, or feel my chest against some other part of me, accidentally seeing or feeling my chest when getting dressed, when I have to 'rearrange' myself in my binder, cisnormativity (particularly when discussing something that affects me, but talking about it as a 'womans thing'). And also, swimming! I love to swim, but I get so unhappy trying to get ready for it, I just don't know what to wear!
Sometimes I get dysphoric about less obvious aspects of my body, like my arms being slim and lacking any tone, or my small shoe size. And also, being non binary, seeing things that are extremely binary can cause dysphoria; toilets/changing rooms are a big one for that because neither one feels right, but also things like 'ok lets get all the guys on this side and all the girls on the other!', or even something seemingly innocent, like 'are you a boy or a girl?' at the start of the Pokemon games.