Dynamic coupling of emotion and pain: from perception to affective response.

Pain is a complex experience serving as a protective response to actual or potential tissue damage. Although perceived as a sensory phenomenon, pain integrates both sensory and emotional components, with perceptions varying based on socio-cultural, cognitive, and biological factors. This narrative review synthesizes current evidence on how emotions mechanistically influence pain perception and processing. Emotion-pain coupling is examined across three levels: (1) neurobiological mechanisms involving descending pain modulation, limbic circuits, and neurotransmitter systems; (2) affective emotional processes including fear, anxiety, stress, positive affect, and motivation; and (3) three clinically relevant affective mechanistic phenotypes-fear avoidant, stress-sensitized, and anhedonic-that integrate emotional and pain profiles. The authors present practical assessment strategies for identifying these phenotypes in routine clinical settings and propose emotion regulation-informed interventions tailored to each phenotype. The framework aims to bridge neuroscience research and clinical practice by translating mechanistic understanding into actionable clinical approaches.