If the inflamed skin is severe, ask your veterinarian for lidocaine spray and use it sparingly to control surface pain before applying topical treatment. Pain adds stress and stress should be avoided. You should experiment to find the most effective solution with the least discomfort. Start carefully with a dilution to see how much your dog can tolerate. Apply to sores and infected areas once or twice daily.
Yellow dock is effective as an itch treatment.
Other herbs that help with itching are calendula and aloe vera. Add 10 drops of grapefruit seed extract and six drops each of tea tree oil, golden seal root, olive leaf extract, and pau d'arco. Keep away from the eyes. Spray or dab onto sores once a day. After each application each case, allow the topical solutions to dry.