I have had cat almost all my life, and just learned something new. For the first time in my life I have a ginger kitty. She had tiny dark spots in her mouth, at first I thought she had been eating dirt from what few plants I have left. And today I noticed they are getting bigger. I'm unemployed, and don't need a vet visit. So like every good cat mom, I consulted Dr. Google. And I'm so glad I did! From [thesprucepets.com]

The most common reason for these dark spots is lentigo simplex, a genetic condition that is most common in orange tabby, calico, flame point, and tortoiseshell cats. Most often the spots (called lentigines) appear in middle-aged to older cats, but they can begin appearing in cats as young as one-year-old.

Owners usually notice the small dark spots on the lips or nose first, only to worry as more dots appear and some grow a bit larger. Most cats have a single lesion or a handful of lesions, which is characteristic of lentigo simplex; others may have a great number of lesions, which is characteristic of lentigo profusa. If your cat is prone to freckling, expect more lentigo lesions as he or she ages.

Rest assured: Lentigo is not a form of cancer, nor do lentigo spots advance to become melanomas. Lentigo is, in fact, completely harmless, like human freckles, and no medical treatment is necessary for the condition. That said, one cannot assume that every dark spot on your pet is harmless; this is just the most common scenario. Have your cat checked out by your veterinarian to be sure.

Bottom line, my cat has freckles in her mouth.