It looks quite a bit like the warts (at least that's what one vet called them, not sure of the techincal term) that older dogs get. Reggie has some and I see older dogs in the grooming salon with them all the time. They are usually light pink though not red like that and Kia isn't that old so maybe have a vet check it out. It could be insect bite or something too but I'd think it would be itching her?