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That Annoying Morning Jaw Ache? It Might Not Be ‘Stress’ After All

You slept a full eight hours. So why does your jaw feel like it spent the night doing heavy lifting? That tight, achy feeling when you wake up — the dull pressure behind the temples, the teeth that feel oddly sensitive before you've even had breakfast — is one of the most commonly dismissed symptoms in sleep health. Most people chalk it up to stress or sleeping in a bad position. But more often than not, the real cause is teeth grinding (bruxism), and it's happening while you're completely unconscious. Why Teeth Grinding Is So Easy to Miss Most people who grind at night have no idea they're doing it. You don't hear it. You don't remember it. Your partner might — that low, rhythmic grinding sound is hard to sleep through — but even then, it's easy to dismiss as a one-off. The problem is that grinding is rarely a one-off. For most people, it happens every night, for hours at a time, with a force that can be 10 times stronger than normal chewing. Over months and years, that adds up to: Worn-down tooth enamel and increased sensitivity Tiny cracks in teeth that worsen over time Chronic jaw muscle fatigue and tension headaches Damage to existing dental work (fillings, crowns, veneers) TMJ (temporomandibular joint) pain and clicking The frustrating part is that by the time most people realise they grind, the damage has already started. The Signs You Might Be Grinding You don't need a dentist to tell you — your body usually gives you enough clues: Jaw tightness or soreness first thing in the morning Headaches that start at the temples and ease through the day Teeth that feel sensitive to hot, cold, or pressure A partner who mentions grinding sounds during the night Visible wear on your teeth (your dentist may have already flagged this) Difficulty opening your mouth wide or pain when chewing If two or more of these sound familiar, a night guard is worth trying. What a Night Guard Actually Does A night guard doesn't stop you from grinding — nothing really does, because it's an involuntary muscle behaviour during sleep. What it does is create a protective barrier between your upper and lower teeth so the grinding force is absorbed by the guard rather than your enamel and jaw joints. The result: your teeth are protected, the pressure on your jaw muscles is reduced, and most people notice significantly less morning tension within the first week or two. Why Comfort Is Everything The most common reason people stop using a night guard is that it feels too bulky or uncomfortable. If it's awkward to wear, you'll take it out in your sleep or just stop using it altogether. This is why thin, mouldable guards have become the standard for mild to moderate grinders. The SOVA Aero Night Guard is 1.6mm thin — about the thickness of a credit card — and self-moulds to your teeth at home using warm water. Most people forget they're wearing it within a few nights. Shop SOVA Aero — Ultra-Slim Night Guard For heavier grinders, the SOVA MAX Night Guard offers 2.4mm protection with the same self-fit system — more durable for people who grind hard enough to chew through standard guards. Shop SOVA MAX — Heavy-Duty Night Guard If you grind moderately and want something between the two, the SOVA 3D offers a contoured fit with 3D channel technology that allows saliva flow and a more natural feel. Shop SOVA 3D Night Guard What About Kids? Children grind too — often more than adults. If your child wakes up with jaw pain or you hear grinding at night, the SOVA Junior Aero is designed specifically for ages 6–11 with a smaller fit and the same self-moulding system. Shop SOVA Junior When to See a Dentist A night guard is a protective measure, not a diagnosis. If your jaw pain is severe, you have significant tooth damage, or you suspect TMJ disorder, see your dentist. They can assess the extent of any wear and recommend whether a custom-fitted guard (made from a dental impression) is more appropriate for your situation. For mild to moderate grinding, an over-the-counter self-fit guard is a practical and cost-effective starting point — and most people find it makes a noticeable difference quickly. The Bottom Line Sleep is supposed to restore you. If you're waking up with a sore jaw, tension headaches, or sensitive teeth, your body is telling you something is happening overnight that shouldn't be. A thin night guard is a simple, low-cost way to protect your teeth and wake up feeling like you actually rested. Browse All Night Guards at Sleep & Sound