One of the questions that we are asked often as podiatrists is the difference between a corn and a callus…. This is closely followed by what’s the difference between a corn and a wart??? Well, they are similar and also very different! The similarities is that they all generally involve hyperkeratosis of some kind which is basically hard toughened skin. But the causes behind them are different. Lets start with a wart or verruca. A wart is a virus. It is actually the human pap