Some kitties get it even when they conscientiously wash themselves, others don’t. I don’t really know the reason. EDIT:
Feline acne
Another problem that you and your cat may face is feline acne. This is a common example of cat skin problems, and can be seen in the form of blackheads that will form on your cat’s chin, lower lip and face. The main reason that your cat will come across this problem is if it has enlarged sebaceous glands around the face; the same reason that humans suffer from acne.
If you notice that your cat is rubbing its face on the ground, it is trying to activate the glands that produce an oily secretion. This is known as marking, and is one cause of feline acne.
Plastic pet food bowls could be a cause of cat chin acne. Dirt and bacteria can find their way into the many scratches and indentations in the plastics surface and thus infect your cat around the chin area.
Problems with the coat or skin are more noticeable on white or pale colored cats because of their light pigment. But remember, just because you cannot see a problem with your cat’s skin does not mean that it doesn’t exist.
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Stress-related acne can be treated by finding the causes of the stress and eliminating or ameliorating them, if possible. Emotionally cause stress may be relieved by medication, flower essences, or pherome-based products, such as Feliway. Environmentally caused stress might be solved by doing whatever possible to change the environment (move the furniture back that you just moved, or back off and gradually re-introduce that new cat or dog.)
Feline acne starts as small, oily black plugs in the chin, much like blackheads, which may progress to red, itchy bumps, which may become infected. Treatment varies, but most veterinarians will recommend daily cleaning with an antibiotic soap, followed by a topical ointment, either antibiotic, or anti-fungal. Oral antibiotics may also be prescribed, as well as a scrub with hydrogen peroxide.
Severe cases of feline acne may be difficult to eradicate, so you’ll want to take your cat to the veterinarian at the first sign of black spots on the chin. Although cats are not embarrassed by acne, as humans are, the condition is still potentially serious, and not to be ignored.