<unk> s are a cutaneous condition caused by some<unk> s that secrete a toxic liquid that causes a brownish pigmentation or burn when it comes into contact with the skin. Some<unk> s produce quinones in their defensive secretions, which have been reported to cause brown staining of the skin.
Millipede burn
Friction burn
Flash burn
Electrical burn
Heel stick wound
Windburn
Phagoburn
Hydrofluoric acid burn