HCA: Hermit Crab Association

Thank you for answering. She did not get into a fight with another crab. She came up from the sand after her exo hardened after her molt and was like this. She was in an isolated tank when she molted and has had no contact with other crabs

Hello, one of my purple pinchers just molted and she has these spots on her big claw and I don't know what it is. They are black and white and her larger claw almost appears bloody. I can't find anything online about it. Does anyone know what it is? She didn't have these spots on her before she molt...