过度警觉（英语：hypervigilance）是指经常表现为警惕地扫视周围环境以寻找危险迹象的过分警觉状态。常见于偏执型人格、创伤后应激障碍、被父母虐待或忽视的儿童，以及使用某些类型的精神活性物质。

Hypervigilance is an enhanced state of sensory sensitivity accompanied by an exaggerated intensity of behaviors whose purpose is to detect threats. Hypervigilance is also accompanied by a state of increased anxiety which can cause exhaustion. Other symptoms include: abnormally increased arousal, a high responsiveness to stimuli, and a constant scanning of the environment for threats.