Persistent Pain After Inflammatory Control: A Dynamic Interpretation of Residual Pain, Sensitization, and Recovery Delay. Conceptual Note — Dynamical Disease Models / URM Series.

This Conceptual Note develops a Universal Resonance Model (URM) interpretation of persistent pain after apparent inflammatory control. It proposes that residual pain should not automatically be interpreted as ongoing inflammatory activity, treatment failure, or patient-reported noise. Instead, persistent pain may reflect altered recovery dynamics, sensitization, delayed return to baseline, and system-level persistence after the original inflammatory driver has improved. The note distinguishes inflammatory pain from residual pain trajectories and sensitized pain-system states. It argues that the clinically important question is not only whether pain remains, but whether the pain-regulation system is recovering, sensitizing, or becoming locked into a persistent trajectory. This work does not replace established nociceptive, inflammatory, neuropathic, central sensitization, or biopsychosocial models of pain. It adds a dynamic interpretive layer for understanding residual symptoms, recovery delay, and pain-system regulation in immune-mediated disease. The note is intended as a conceptual contribution to dynamic medicine, systems medicine, rheumatology, persistent pain interpretation, and the URM framework.