Any time new symptoms develop after a car accident, a medical exam is needed. There are many vital organs and structures behind the breast bone (sternum) that could be damaged from the impact with the steering wheel.
A shoulder injury can also affect the sternoclavicular joint (SCJ). The SCJ is located where the clavicle (collar bone) connects to the sternum. There could be a partial dislocation or subluxation of this joint.
Don’t wait to get her in to see a doctor. This may be an emergency and should be treated as such. Difficulty swallowing called dysphagia could indicate swelling of the esophagus or a more serious injury.