Technically, anyone licensed to practice law in your state can represent you in any case.
In reality, however, you should find an attorney who specializes as much as possible in your exact type of case. While there are no requirements to represent someone in a personal injury case — outside of being a licensed attorney — there are many certifications and recognitions for personal injury lawyers.
In many states, for example, completing a certain amount of Continuing Legal Education (CLE) earns an attorney certification in personal injury law. Practicing in personal injury for a length of time, typically ten years or more, will also be recognized by some state bar associations.
If a lawyer you’re considering tells you they are certified or a “personal injury specialist,” ask them what that means. While classes on personal injury law are probably helpful, they’re no substitute for experience and results.