身體的疼痛指通常由身體損傷、病患或不良的外部刺激所引起的不舒服感覺。出於臨床研究的需要，國際疼痛研究協會（International Association for the Study of Pain）將疼痛定義為「由真正存在或潛在的身體組織損傷所引起的不舒服知覺和心理感覺」
疼痛是主觀的感覺，早於1968年疼痛處理專家Margo McCaffery首次提出一個在護理學界普遍使用的定義：「一個人說感到痛，這就是痛；他說痛仍在，痛就仍在。」（原文：Pain is whatever the experiencing person says it is, existing whenever he says it does）
- 深層軀體疼痛源自韌帶、腱、骨、血管或肌肉，由軀體痛觉感受器感應，其分布較疏，引起隱隱作痛的感覺，位置亦不明顯。扭傷、斷骨和肌膜疼痛症候群（Myofascial pain syndrome）屬此類。
- ^ This often quoted definition was first published in 1979 by IASP in Pain journal, number 6, page 250. It is derived from a definition of pain given earlier by Harold Merskey: "An unpleasant experience that we primarily associate with tissue damage or describe in terms of tissue damage or both." Merskey, H. (1964), An Investigation of Pain in Psychological Illness, DM Thesis, Oxford.
- ^ See IASP Pain Terminology. The whole entry on the term pain itself reads like this:
Pain. An unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage. Note: The inability to communicate verbally does not negate the possibility that an individual is experiencing pain and is in need of appropriate pain-relieving treatment. Pain is always subjective. Each individual learns the application of the word through experiences related to injury in early life. Biologists recognize that those stimuli which cause pain are liable to damage tissue. Accordingly, pain is that experience we associate with actual or potential tissue damage. It is unquestionably a sensation in a part or parts of the body, but it is also always unpleasant and therefore also an emotional experience. Experiences which resemble pain but are not unpleasant, e.g., pricking, should not be called pain. Unpleasant abnormal experiences (dysesthesias) may also be pain but are not necessarily so because, subjectively, they may not have the usual sensory qualities of pain. Many people report pain in the absence of tissue damage or any likely pathophysiological cause; usually this happens for psychological reasons. There is usually no way to distinguish their experience from that due to tissue damage if we take the subjective report. If they regard their experience as pain and if they report it in the same ways as pain caused by tissue damage, it should be accepted as pain. This definition avoids tying pain to the stimulus. Activity induced in the nociceptor and nociceptive pathways by a noxious stimulus is not pain, which is always a psychological state, even though we may well appreciate that pain most often has a proximate physical cause.
- ^ McCaffery M. Nursing practice theories related to cognition, bodily pain, and man-environment interactions. LosAngeles: UCLA Students Store. 1968.
- ^ More recently, McCaffery defined pain as "whatever the experiencing person says it is, existing whenever the experiencing person says it does.” Pasero, Chris; McCaffery, Margo. Pain: clinical manual. St. Louis: Mosby. 1999. ISBN 0-8151-5609-X..
- ^ National Pain Education Council
- ^ From the American Board of Medical Specialties website: "Pain Medicine is the medical discipline concerned with the diagnosis and treatment of the entire range of painful disorders. (...) Due to the vast scope of the field, Pain Medicine is a multidisciplinary subspecialty (...)."
- ^ "Activity induced in the nociceptor and nociceptive pathways by a noxious stimulus is not pain, which is always a psychological state, even though we may well appreciate that pain most often has a proximate physical cause." Source: IASP Pain Terminology.
- ^ Compare definitions at IASP Pain Terminology: "Neurophathic pain — Pain initiated or caused by a primary lesion or dysfunction in the nervous system." and "Neurogenic pain — Pain initiated or caused by a primary lesion, dysfunction, or transitory perturbation in the peripheral or central nervous system."
- ^ Pain Physiology