A good product for this problem is Dermavet which is a healing cream. I will give you some information about Dermavet.
Dermavet is an antiseptic wound-healing cream. It stimulates the epithelialisation phase of wound healing, antiseptic properties create a clean wound environment. Dermavet helps wound heal faster.
Safety in pregnancy and lactation has not been established. Unless otherwise prescribed, do not exceed the stated dose.
Discontinue use of this treatment should any hearing or vestibular (dizziness, vertigo or imbalance) dysfunction be seen.
Antibiotic medications should only be administered to your dog following a consultation and diagnosis from your veterinarian.
Always read the instructions carefully before treatment commences, and always use under the supervision of a suitably qualified person
You need to apply the product twice every day and keep your dog dry.