“Personal injury” is a fairly broad category, so it helps to put it in very simple terms. Party A suffers bodily injury due to the actions of Party B. This could mean all sorts of things. This could mean that Party A was blindsided and hospitalized by a car that was driven by Party B. Or Party A had to have extensive and painful surgery because his doctor (Party B) failed to notice an easily recognizable medical condition in its early stages. Or Party A’s house burned down due to a design flaw in a product manufactured by Party B. One of the keys in figuring out whether or not a personal injury case is valid is by determining whether Party B’s actions were negligent, which means that Party B acted in a way that no normal and conscientious person would.