Pain

An unpleasant sensation resulting from damage to nerve tissue, stimulation of free nerve endings, or excessive stimulation. Although pain is generally considered a physical phenomenon, it involves various cognitive, affective, and behavioral factors: It is an unpleasant emotional as well as sensory experience. It may also be a feeling of severe distress and suffering resulting from acute anxiety, loss of a loved one, or other psychological factors (see psychic pain). Because of these various factors, as well as previous experience in pain response, individual reactions vary widely (2). Pain Intensity: severity of pain (1) Pain catastrophizing: the tendency to describe a pain experience in more exaggerated terms than the average person, to ruminate on it more (e.g., “I kept thinking ‘this is terrible'”), and/or to feel more helpless about the experience (“I thought it was never going to get better”)(1) Pain persistency: duration of pain symptoms (1). Chronic pain: pain that lasts or recurs for longer than 3 months (3).

Source:

(1) Herrera-Escobar JP, Osman SY, Das S, Toppo A, Orlas CP, Castillo-Angeles M, Rosario A, Janjua MB, Arain MA, Reidy E, Jarman MP, Nehra D, Price MA, Bulger EM, Haider AH; National Trauma Research Action Plan (NTRAP) Investigators Group. Long-term patient-reported outcomes and patient-reported outcome measures after injury: the National Trauma Research Action Plan (NTRAP) scoping review. J Trauma Acute Care Surg. 2021 May 1;90(5):891-900.
(2) https://dictionary.apa.org/pain
(3) nicholas et al., 2019 – The IASP classification of chronic pain for ICD-11: chronic primary pain