But before that, you also need to determine the car accident injuries symptom. Knowing these symptoms will help you to go for the best treatment that you need after a car accident. During a car accident, you cannot just say which body part will get injured and which one will not. This is very tough to say. But the most common body part like your neck is always vulnerable to injury after a car accident, as this is used to whip back and forward at a great speed during the accident.