Night guards for cluster headache are typically fabricated dental appliances designed to alleviate jaw tension and redistribute occlusal forces, potentially reducing trigeminovascular system stimulation. By creating a protective barrier between upper and lower teeth and promoting a more relaxed jaw position, these devices may help mitigate muscular and neurogenic pain triggers associated with cluster headache pathophysiology. The primary mechanism involves biomechanical stress reduction and potential modulation of trigeminal nerve sensitivity.