Chances are pretty good that if your pup has a minor puncture wound he probably doesn't even know it exists or he does, he thinks licking it will fix the problem. And in time this natural, instinctive behavior may work. But, left unnoticed, the wound could easily become infected, leading to serious conditions such as gangrene setting in. Your pup certainly doesn't need to have that to deal with--proper care is very important.
While it is quite normal for dogs to suffer a number of puncture wounds over their lifetime, how well your pup recovers from such an event depends on your knowing how to treat the wound. As you can see, caring for this kind of wound on your pup is no different than doing the same thing for one of your kids. Well, except for following up with smelly dog treats to reward him for being a good boy.