Teeth Clenching: Its Causes and Cure Contrary to common belief, teeth clenching or bruxism is not exclusive to hyperactive kids who cannot sleep at night. Adults and young people both experience this due to many reasons. Nonetheless, experts in the dental and medical field can summarize these reasons into three - stress, aggressive behavior and abnormal teeth alignment. For more information visit at bayareatmjandsleep.com. in Public bookmarkswith teeth-clenchingby 2 users