I've seen a couple people post in multiple forums looking for an answer to this ailment. QT two clowns, one has a zit like protrusion on her chin. Male has no such ailment. Eating fine and stress includes daily water changes. Feeding selcon and vitachem on frozen food and pellets. I'm thinking just vitamins until I know if meds are needed. I have a small arsenal of fishy meds due to my own paranoia if anybody can suggest what this is?