Can you go swimming with a burn?

Depends on the degree of the burn. If the burn is simply reddened skin after an hour (1st degree burn), and is relatively small ( no more than about a 3" circle or so), there should be no problem. If it's heavily blistered (2nd degree burn), I'd skip the swimming until it heals. Don't pop the blisters yourself. However, when they do pop on their own, if they leave an open wound it can be easily infected. Swimming, especialy in fresh water, increases the risk somewhat.