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Hyperalgesia (/ ˌ h aɪ p ər æ l ˈ dʒ iː z i ə / or /-s i ə /; hyper from Greek ὑπέρ (huper) 'over' + -algesia from Greek ἄλγος (algos) 'pain') is an abnormally increased sensitivity to pain, which may be caused by damage to nociceptors or peripheral nerves and can cause hypersensitivity to stimulus.
The International Association for the Study of Pain (IASP) defines chronic pain as a general pain without biological value that sometimes continues even after the healing of the affected area; [8] [9] a type of pain that cannot be classified as acute pain [b] and lasts longer than expected to heal, or typically, pain that has been experienced on most days or daily for the past six months, is ...
[3] [4] Chronic pain is considered a syndrome because of the associated symptoms that develop in those experiencing this disorder. [5] Chronic pain affects approximately 20% of people worldwide and accounts for 15–20% of visits to a physician. [3] Pain can be categorized according to its location, cause, or the anatomical system which it affects.
Most pain resolves once the noxious stimulus is removed and the body has healed, but it may persist despite removal of the stimulus and apparent healing of the body. Sometimes pain arises in the absence of any detectable stimulus, damage or disease. [4] Pain is the most common reason for physician consultation in most developed countries.
Pain disorder is chronic pain experienced by a patient in one or more areas, and is thought to be caused by psychological stress. The pain is often so severe that it disables the patient from proper functioning. Duration may be as short as a few days or as long as many years.
The main symptom of dysmenorrhea is pain concentrated in the lower abdomen or pelvis. [1] It is also commonly felt in the right or left side of the abdomen. It may radiate to the thighs and lower back. [1] Symptoms often co-occurring with menstrual pain include nausea and vomiting, diarrhea, headache, dizziness, disorientation, fainting and ...
Amplified musculoskeletal pain syndrome (AMPS) is an illness characterized by notable pain intensity without an identifiable physical cause. [1] [6] Characteristic symptoms include skin sensitivity to light touch, also known as allodynia. Associated symptoms may include changes associated with disuse including changes in skin texture, color ...
Intractable pain, also called intractable pain syndrome (IPS), is a severe, constant, relentless, and debilitating pain that is not curable by any known means and which causes a house-bound or bed-bound state and early death if not adequately treated, usually with opioids and/or interventional procedures. It is not relieved by ordinary medical ...