Stress is a problem for more than half of working adults, according to the American Psychological Association. Among the many physiological issues that stress can cause, bruxism may seem relatively minor. But teeth grinding can have much larger effects, such as damaged teeth, headaches, insomnia, and a sore jaw. And despite its prevalence, bruxism is not easy to diagnose. The most common way to do so is to have the patient monitored overnight in a sleep clinic, which is "intrusive," as the researchers say, and impractical.