It is important during cleaning the affected area do not rub the sting, just need to wash it carefully to avoid infections. Once clean, take some ice or frozen vegetable bag and wrap it with a clean cloth. If you can hold it, place the cloth with ice on the bite for 15 minutes to reduce swelling and pain. You can also use cold compresses. Check with your veterinarian about the use of antihistamines to reduce pain and combat the symptoms of the bite. Remember, if your dog has an allergic reaction, severe swelling develops or has an anaphylactic shock, you should go to the vet immediately to proceed to evaluate and initiate the best treatment.