If your skin is red and void of any blisters, you likely have a first-degree burn. You have sustained a second-degree burn if the skin has blisters and has thickened. If your burn looks leathery, dry, and dark red, it might be a third-degree burn. Lastly, if your burn is not painful and appears white or charred and you can see muscle or bone, you have suffered a fourth-degree burn.