What Causes Sleep Apnea?

Sleep apnea is one of the most common sleep disorders in the United States — and one of the most underdiagnosed. Millions of people have it without knowing it, often attributing their daytime fatigue, morning headaches, and poor sleep quality to stress or aging rather than a treatable medical condition. Understanding what actually causes sleep apnea is the first step toward recognizing whether it might be affecting you or someone you care about.

What Is Happening When Sleep Apnea Occurs

Obstructive sleep apnea — the most common form — occurs when the muscles in the back of the throat relax too much during sleep to allow normal breathing. These muscles support the soft palate, the uvula, the tonsils, and the tongue. When they relax, the airway narrows or collapses entirely, blocking airflow. The brain detects the drop in oxygen and sends a signal to rouse the body just enough to reopen the airway — usually without the person fully waking up. This can happen dozens or even hundreds of times per night, each time briefly interrupting sleep and reducing the quality of rest.

Risk Factors That Increase Your Likelihood of Sleep Apnea

Several factors contribute to whether a person's airway is prone to this kind of collapse:

• Excess weight — Fat deposits around the upper airway can narrow the breathing passage and increase collapse risk significantly. This is the most modifiable risk factor.
• Anatomy — A naturally narrow airway, a thick neck, enlarged tonsils or adenoids, or a recessed jaw can all make someone structurally more susceptible, regardless of weight.
• Age — Muscle tone decreases with age, including in the throat muscles that keep the airway open.
• Sex — Men are more commonly affected, though the risk for women increases significantly after menopause.
• Nasal congestion — Chronic nasal blockage, whether from allergies or anatomy, increases the likelihood of mouth breathing and airway collapse during sleep.
• Smoking and alcohol — Both relax the throat muscles and increase airway inflammation, worsening collapse risk.
• Family history — Sleep apnea has a genetic component; if a close relative has it, your risk is elevated.

Why Sleep Apnea Matters Beyond Sleep

The health consequences of untreated sleep apnea extend well beyond fatigue. Each apnea event — each time the airway collapses and breathing stops — stresses the cardiovascular system. Over time, this contributes to high blood pressure, irregular heart rhythm, increased risk of heart attack and stroke, insulin resistance, cognitive decline, and depression. Sleep apnea has also been linked to metabolic syndrome and worsened outcomes in patients with diabetes. It is, in other words, not just a sleep problem. It's a whole-body health issue.

The Connection to Dentistry

This is where a dentist who practices dental sleep medicine becomes particularly valuable. The position of the jaw during sleep has a direct effect on the airway. Custom oral appliances — designed and fitted by a trained dental sleep medicine provider — reposition the jaw slightly forward, keeping the airway open during sleep without the bulk, noise, or discomfort of a CPAP machine. For many patients, especially those who can't tolerate CPAP, oral appliance therapy is a life-changing alternative.

At The Local Dentist, Dr. Chaz Vittitow has specific training and focus in dental sleep medicine. He was among the first board-certified providers in Whatcom County through the American Academy of Dental Sleep Medicine. If you suspect sleep apnea — in yourself or a partner — call us at (360) 543-8488 to schedule a consultation. Better sleep is genuinely within reach.