Not really. It's often the BGA soldering on the bottom that fails first. If it does, get another one. It's cheap. As long as you can't boil water with it, it should be fine indefinitely. If there are problems, internal thermal throttling will kick in. It kinda depends on how good the contact is between the CPU and heatsink, but if you make as much heat as possible continuously for many hours and don't come close, don't worry about it.