6
There are communities such as "Off My Chest" (https://lemmy.ml/c/offmychest, https://lemmy.ml/c/goodoffmychest@lemmy.world, I'm hyperlinking instead of Fediverse-mentioning because I'm not sure if the Fediverse platform I'm in, Calckey, will end up spawning a thread there if I were to mention the community's handle).
However, I'm not sure whether these communities (or the instances they're in) allow for hinting at injuries or scars. I remember seeing threads with "CW: scars" in the title, but I'm not sure if said threads remained.