Occlusion may refer to: Health and fitness Occlusion (dentistry), the manner in which the upper and lower teeth come together when the mouth is closed Occlusion miliaria, a skin condition Occlusive dressing, an air- and water-tight trauma dressing used in first aid Vascular occlusion, blockage of a blood vessel Vascular occlusion training, or blood flow restriction training, a technique done by some bodybuilders Other uses Ambient occlusion, a shading method used in 3D computer graphics Occluded front, part of cyclone formation Occlusion culling, or hidden surface determination, a 3D computer graphics process Occlusion effect, an audio phenomenon Occlusive, in phonetics See also Occlusion training (disambiguation) Occultation, when one object is hidden by another object that passes between it and the observer