Again, an afﬂiction that cats and humans share. Technically, it’s called pediculosis, louse infestation. Tiny lice chomp on skin tissue and are contagious via contact, speciﬁcally by passing from one host’s hair to another host’s hair. The nasty little insects are itchy and irritating but basically harmless, and they can be easily gotten rid of with special medicinal shampoos. If you or your cat has ever had lice, be sure to wash all your bedding thoroughly.