Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.
How long has this been present?
Any crusting, scaling, pimples or pustules?
Has she had any issues passing urine? Dribbling, straining to pass small volumes, or changes to her urine?
Any pus or discharge from her vagina?
Do her nipples look prominent? Any mammary development?
Can you take a photo of these skin changes? If you can and post them, it will let me see what you are seeing. To post them online, you can use the paper clip icon above your text box. Or if you cannot see that on your phone/computer, just post them on any site (ie Flickr, Photobucket, Imgr etc) and paste the web link here for me follow.