Continue with the benadryl 1mg per 1lb of Bully every 8 hours. Wash the areas with baby shampoo, ivory soap, hibiclens, witch hazel, something gentle. If your dog is not diabetic you can apply hydrocortizone cream to the sore areas which will help with the itching. Do not apply anything with zinc in it like calamine lotion.
Distract with a great treat that last like and antler and hopefully the bumps will be cleared up in a few days!