Most people think of joints as knees, hips, shoulders and wrists. The jaw is a joint too. The temporomandibular joint sits just in front of each ear, where the lower jaw hinges onto the skull, and it moves every time you talk, chew or yawn. After a car crash, a fall or a hard blow to the head or face, that hinge can feel different, and many people do not connect the change to the wreck until days later.
Why the jaw gets missed
When the body is busy with a stiff neck, a sore back or a bruised chest, the jaw can fade into the background. People often describe a dull ache near the ear, a tired feeling after chewing for a few minutes, or a sense that their teeth no longer come together the way they used to. Some notice the jaw only when they yawn wide, bite into an apple or try to laugh.
These are observations, not diagnoses. A change in how the jaw moves is worth noting and mentioning to an examiner, whatever the cause turns out to be.
What to notice at home
Before your visit, spend a few quiet minutes paying attention to the jaw. Start with chewing. Which foods are harder now than they were before the crash? Do you favor one side when you bite? Does chewing gum or tough meat leave the jaw sore or fatigued?
Next, check how wide you can open comfortably. Does the jaw stop short, catch, or drift to one side as it opens? Is there a click or pop, and does it come with pain, or is it silent? Has the jaw ever locked for a moment and then released? Also note whether your bite feels different, such as teeth meeting unevenly or a dental crown, filling or denture feeling off.
Finally, track where the discomfort sits. Is it near the ear, in the temple, down the side of the face, or into the neck? Does it show up when you talk, or mostly at the end of a long meal? Some people also notice morning headaches or tightness along the temples, which they may connect to clenching during sleep. Write those down too, along with anything you already tried, such as soft foods, warm packs or resting the jaw.
The jaw and the rest of the crash
Jaw symptoms often travel with other complaints. The neck, upper back and shoulders share muscles and posture with the jaw, so an examiner usually looks at the whole picture rather than the jaw alone. That is one reason to describe your crash in plain terms: when it happened, which part of your body struck what, whether your head moved forward or back quickly, and what you noticed in the first hours and days afterward.
What the exam may cover
At a typical exam, the examiner may ask you to open and close slowly, move the jaw from side to side, and press gently on the muscles around the joint. They may check the neck and posture, and they may ask about your bite and any dental work. Clicking, catching or pain with movement helps them decide what to look at next. Depending on what they find, they may suggest further testing or a referral to a dental specialist. You are free to ask what each step is for before you agree to it.
Keeping your notes useful
Write your observations in a notebook or on your phone, and date each entry. Keep it short, since a few lines a day is enough. If the jaw locks open or shut, or if you have trouble swallowing, breathing or opening your mouth at all, do not wait for a scheduled visit. Seek urgent care right away.
Bring your notes to the exam, along with the names of any dentists or providers you have seen since the crash. A plain account helps an examiner separate what the jaw is doing from what the neck, back or head is doing. No single note settles the question, and an exam is where the full picture gets assembled. A first visit is a starting point for understanding your symptoms, not a promise of how the jaw will feel later.