First, you must have suffered an injury to your person or property. Second, you should consider whether your injury was someone else's fault. It is not always necessary to have a physical injury to bring a personal injury lawsuit — some personal injury claims can be based on a variety of nonphysical losses and harms. 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. Similarly, you also may have a case if someone has caused injury to your reputation, invaded your privacy or intentionally inflicted emotional distress upon you.