What Causes Teeth Grinding During Sleep in Adults?

Bruxism—grinding or clenching teeth during sleep—is a frustrating habit. It not only disturbs others’ rest but also impairs the individual’s own sleep quality. Chronic nocturnal bruxism can even cause dental wear and damage; therefore, it is advisable to address and eliminate this habit. So, what causes bruxism in adults?

Causes of Nocturnal Bruxism in Adults

Nocturnal bruxism in adults may stem from gastrointestinal discomfort, improper diet, or intestinal parasitic infections. Inadequate brushing and rinsing before bedtime leave food debris on the tongue and tooth surfaces. During sleep, these residues can irritate taste buds and gustatory nerves, potentially triggering bruxism. Consuming greasy or hard-to-digest foods shortly before bed may also contribute to nighttime grinding.

Dental conditions—including dental caries, pulpitis, apical periodontitis, or oral mucosal disorders—can increase pathogenic factors within the oral cavity, leading to swelling, discomfort, and subsequent bruxism. Additionally, severe malnutrition, calcium deficiency, or vitamin D insufficiency may predispose individuals to nocturnal bruxism. Excessive daytime stress or overexcitement can prevent full cortical relaxation during sleep, resulting in localized abnormal neuronal discharges that provoke bruxism. Treatment options include occlusal adjustment, anxiolytic medications (e.g., diazepam), and emotional regulation strategies.

Before bedtime, be sure to brush your teeth thoroughly, avoid excessive physical or mental fatigue, and maintain healthy sleep hygiene. We hope this information proves helpful to you.