That yellowish bump... is it firm or soft?
Vetericyn is the product I would think about using [EDT: as others have already said. It's anti-microbial and effective. It's used for pinkeye in cattle], and @casportpony is the person I would call.
Vetericyn is the product I would think about using [EDT: as others have already said. It's anti-microbial and effective. It's used for pinkeye in cattle], and @casportpony is the person I would call.