By doing a thorough medical examination, your doctor can accurately diagnose your injuries and recommend the appropriate treatment. They can also identify any internal injuries you might have suffered preventing medical emergencies later on. Another reason to seek medical evaluation after an accident is that it will result in an official medical documentation. Without the appropriate medical documentation, the insurance company will try to argue that your injuries are not serious and that it was not caused by the accident. If you have more questions, please consult with an experienced personal injury attorney.