By licking your dog has brought large amounts of bacteria to this open wound and has irritated the skin surrounding the wound. This wound is likely infected and I suspect past the point that topical antibiotics like Neosporin are going to help. Your dog needs to be examined by a veterinarian for appropriate care.
Before your appointment you can clean the wound gently with a mild anti-bacterial soap and warm water. Do not use alcohol or hydrogen peroxide. You also need to keep your dog from licking--this can be done by Elizabethan Collar. If your dog continues licking this wound it will not heal.
Before your appointment you can clean the wound gently with a mild anti-bacterial soap and warm water. Do not use alcohol or hydrogen peroxide. You also need to keep your dog from licking--this can be done by Elizabethan Collar. If your dog continues licking this wound it will not heal.