If your body was injured or your property was injured, then you have suffered a personal injury. However, not all injuries are someone else's fault. It is not always necessary to have a physical injury to bring a personal injury lawsuit. In the case of an assault, for example, you do not need to show that a person's action caused you actual physical harm, but only that you expected some harm to come to you. Some of the most common types of personal injury cases involve car accidents, or individuals who have fallen. Less common personal injury cases involve lead paint, negligent security, and medical malpractice.