Even a minor fender-bender can cause sprains, strains, and other soft-tissue injuries. What feels like a minor injury may become a major pain without medical attention. After an auto accident, it's important to seek proper medical treatment as soon as you are able. But it's also important to know that some injuries don't manifest until months later. For the good of your health as well as any pending insurance or personal injury claim, get a proper diagnosis and don't let emergency room doctors overlook any possible soft-tissue injuries. If you suffer from muscle spasms, stiffness, numbness or tingling, or back pain, get it checked out.