Waking Up with a Headache? Visiting the Dentist Can Help.

You might not expect a dentist to write about headaches, but I’ve been treating them for more than 25 years, and it’s one of the most rewarding parts of my practice.

A quick internet search on headaches reveals endless causes and treatments, yet the most common type, the tension headache, accounts for about 60% of all cases. This is the headache many people wake up with daily: not debilitating, but persistent. It can sit on both sides of the head, settle in the forehead, mimic sinus pressure between the eyes, or start at the base of the neck and creep upward.

Online sources often blame stress, hormones, allergies, or medication overuse. Treatments range from over-the-counter pain relievers to herbal supplements, Botox, chiropractic care, and prescription drugs. But one major cause rarely mentioned is nighttime clenching.Three muscles drive jaw clenching:

• the temporalis, covering each side of the skull
• the masseters, the powerful jaw muscles at the cheeks
• the pterygoids, which attach inside the jaw and connect near the sinus floor

During sleep, these muscles can contract with far more force than during the day. When awake, you can consciously release these muscles if your jaw feels tight. At night, that control disappears, allowing prolonged, intense clenching.

Add daytime clenching triggered by stress, work, social interactions, screens, news, and family,  and many people end up clenching around the clock. Over time, these overworked muscles become sore. And because they’re integral to the head, muscle pain becomes head pain. Quite literally: head + ache = headache.

Men and women clench equally, but women tend to suffer more from the effects and experience more tension headaches, possibly due to hormonal factors. I routinely find muscle tenderness in patients as young as ten. Many women have lived with these headaches for years. When I press on the temporalis muscle during an exam, they often say, “Yes, it always hurts there,” without realizing that this everyday pain is connected to their headaches.

One of the most effective treatments for headaches caused by clenching is a small nighttime mouthguard called an NTI — short for Nociceptive Trigeminal Inhibition Tension Suppression System. Unlike a traditional mouthguard that covers all the teeth, the NTI fits only over the front four incisors of either the upper or lower arch. It’s designed to contact only the opposing front teeth, and this is the key to how it works.

The science behind it is surprisingly simple: the incisors aren’t built for heavy clenching or grinding. That job belongs to the posterior teeth — the molars, premolars, and canines. When only the front teeth touch, the major jaw-closing muscles don’t fully contract. So during sleep, when clenching is typically strongest, those overworked muscles finally get to rest. And when the muscles rest, the pain they’ve been generating can disappear.

Test this concept yourself: First, clench your teeth as hard as you can while placing your fingers on your temples. You’ll likely feel the temporalis muscles bulge. Next, place a pencil or pen between your front teeth and clench again. Most people notice that muscle activity is dramatically reduced.

The NTI works on the same principle. By preventing full clenching, it allows the jaw muscles to relax at night. Patients often report waking up without pain and feeling more rested. Many also notice reduced sensitivity to cold drinks and less daytime clenching. Once they become aware of the habit, they can consciously stop it – something that isn’t possible during sleep.