Jaw Pain After a Hit: What I Should Have Taken Seriously

Eleven weeks. That is how long I ignored my jaw. What finally moved me was yawning in a supermarket car park and feeling it catch, briefly, halfway open. Maybe two seconds. Long enough to be properly frightening.

The hit had been in March. A heel-side edge went, my chin met the water at speed with my teeth apart, and nothing broke. My teeth were completely fine. But the joint in front of my left ear started clicking on the way open, and by week three I could not chew a bread roll on that side without a dull ache running up towards my temple.

Usual disclaimer, and I mean it here more than anywhere: I am not a dentist or a doctor. This is one person's experience plus what I read while worrying about it.

Jaw pain is at least three different problems

This is what I did not grasp at first. The phrase covers several separate things with different fixes.

• Muscle pain. The chewing muscles are overloaded, usually from clenching or from holding everything tight after an injury. Dull ache, worse in the morning or after a session, spreads to the temple and behind the eye.
• Joint pain. The temporomandibular joint itself, including the small disc inside it. Clicking, catching, restricted opening, a sharp point of pain right in front of the ear.
• Tooth pain in disguise. A cracked tooth or an infection can radiate along the jaw so convincingly that the tooth never crosses your mind.
• Actual bone injury. A fracture of the jaw or of the joint. Usually not subtle, but not always obvious either, particularly with adrenaline still running.

Mine was mostly the first with a bit of the second, which is apparently the common pairing. I had spent three weeks holding my jaw rigid because it hurt, and the holding was doing more harm than the original impact.

The signs that mean stop and get seen today

This is the list I brief staff with now. None of it is ambiguous:

• Your teeth do not meet the way they used to. Any change in how the bite lands is a genuine red flag.
• Numbness in the lower lip or the chin.
• You cannot open more than a couple of centimetres, or you cannot close.
• The jaw swings off to one side as it opens.
• Bleeding from the ear after a blow to the jaw.
• Swelling that is getting worse over hours rather than better, especially alongside a fever.

Any of those means an emergency department or an urgent dental appointment, not wait and see. For the non-emergency version, the NHS overview of temporomandibular disorders is a reasonable plain-English starting point, and it was the first thing I read that made me feel like I was not inventing symptoms.

What actually worked was embarrassingly boring

Ten days of soft food. Not blended, just nothing that needed real work: no baguettes, no steak, no chewing gum, nothing I had to open wide for. Cutting food smaller than felt necessary. Supporting my chin with a fist when I yawned, which looks ridiculous and works. Heat on the muscle for fifteen minutes a couple of times a day. And hardest of all, noticing during the day that my teeth were touching.

That last one took weeks to shift. Your teeth are supposed to be apart at rest. Lips together, teeth slightly apart, tongue up on the roof of the mouth. I had been resting with my molars in contact for most of every working day for years, and once I started catching it I caught it everywhere. On the water, on the phone, driving, reading. The cue that finally worked was a sticker on the van dashboard and another on my laptop. Nothing clever, just something in my eyeline forty times a day.

Clenching and training go together

Grip and jaw are wired together. Watch anybody loading a heavy set, hanging off a bar in gusty conditions, or committing to a jump they are unsure about, and their jaw is locked solid. That is normal and it is harmless for thirty seconds. It becomes a problem across a four-hour session, four days a week, for years, and then again at night when your nervous system is still wound up from all of it.

A guard helps with wear on the teeth, and for some people it settles the muscles too. It does not stop you clenching. That distinction took me a while to accept. A night guard is a shock absorber for your teeth, not a treatment for whatever is making you grind them, and if the underlying thing is stress or breathing or an injury you have not dealt with, that still needs attention on its own terms. I went through the differences between guard types in custom versus boil-and-bite.

Two more things I would flag. Erosion and clenching compound each other, because acid-softened enamel wears far faster under load, and I covered the acid half of that in sports drinks and enamel. And if your pain started with one specific impact rather than creeping in over months, get the teeth themselves checked as well as the joint. A tooth that took the same hit can die quietly a year later without ever giving you an ache, which is exactly what happened to mine.

How it ended

Roughly four months to settle, and not in a straight line. There were weeks where I thought it had gone, then a bad night or a hard session would bring it back for a couple of days and I would convince myself I was back to square one. I was not. The trend was downwards the whole time, it was just noisy.

It still clicks slightly, and I have made my peace with that, because the pain has gone and a painless click is apparently common and mostly ignorable. That single piece of reassurance is the thing I could not find during the eleven weeks I spent worrying, so I am putting it here in case you are in week three of your own version and wondering whether this is permanent.