After a car accident, a doctor may perform a variety of tests to determine the extent of your injuries. This may include a physical examination, during which the doctor will check your vital signs and look for any obvious signs of injury, such as bruises or cuts. The doctor may also order X-rays or other imaging tests to get a better look at your bones and other internal structures. Depending on your symptoms, the doctor may also order blood tests or other laboratory tests to check for internal bleeding or other injuries. The specific tests that a doctor will perform will depend on your individual situation and the specific injuries that you have sustained.