I would recommend giving him a bath with baking soda and warm water.  Otherwise, you should bring him to the vet as soon as possible.
assitant
Well, first we should determine the degree of infection.  What were the first signs of infection?
assistant
Help!  My dog got sprayed by a skunk!
user
Oh, I’m so sorry!  How bad is the situation?
assistant
Horrible. He stinks
user
Ouch, that must be painful.
assistant
What can I do
user