If your pup has an inset vulva which retains urine or other debris, regular cleaning is necessary to keep this area clean. A bath using cool water and a gentle soap might help if your dog’s rash developed due to contact with an allergen or irritant. Intermittent licking is rarely a problem unless you also notice a vaginal discharge or changes in the vulva’s appearance, her overall health has worsened, or the licking becomes more frequent or intense. Excessive licking can be a sign of infection, injuries, or other problems with your dog’s urinary or reproductive tract. Dogs may go through this entire cycle once every four months to once every 12 months. Call your vet if your dog’s vulva is swollen and you know that she isn’t in heat. Rashes that are severe, produce significant discomfort, or persist for more than a day or two should be evaluated by your veterinarian. Bloody discharge from the vulva is a normal part of an unspayed female dog’s heat cycle. A dog will sometimes lick her vulva to help keep it clean.