How to Ditch Those Morning Headaches? Getting a good night’s sleep is key to feeling rested and rejuvenated. But, if you wake up every morning with a headache, something is happening during your sleep. Grinding or clenching your teeth at night can cause serious damage—like cracks! —to your teeth and even lead to long-term injury of the temporal-mandibular joint (TMJ). Learn how dentists and physical therapists join forces to decrease pain and improve function of those suffering from an injury due to grinding or clenching.