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A cluster headache begins as a severe, sudden headache. The headache most commonly strikes 2 to 3 hours after falling asleep, usually during the dreaming (rapid eye movement, or REM) phase.
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Biochemical, hormonal, and vascular changes induce cluster headaches, but why these changes occur remains unclear. Episodic cluster headaches seem to be linked to changes in day length, possibly signaling a connection to the so-called biological c...
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Pain is a universal human experience. The International Association for the Study of Pain (IASP) defines pain as "an unpleasant sensory and emotional experience associated with actual or potential tissue damage or described in terms of such damage...
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Pain, medically termed "nociception," is a response to noxious stimuli that is conveyed to the brain by sensory neurons . The discomfort signals actual or impending injury to the body. However, pain is more than a sensation, or the physical awaren...
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Pain is an unpleasant feeling that is conveyed to the brain by sensory neurons. The discomfort signals actual or potential injury to the body. However, pain is more than a sensation, or the physical awareness of pain; it also includes perception, ...
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Pain is an unpleasant feeling that is conveyed to the brain by nerves in the body.
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Pain is an unpleasant feeling that is conveyed to the brain by sensory neurons. The discomfort signals actual or potential injury to the body. However, pain is more than a sensation, or the physical awareness of pain; it also includes perception, ...
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A headache is a pain in the head and neck region that may be either a disorder in its own right or a symptom HEADACHE THERAPIES Description Type Acupressure Press pointer fingers beneath cheekbones and parallel to pupils (Stomach 3) for one minute...
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A headache involves pain in the head which can arise from many disorders or may be a disorder in and of itself.
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Headache is a pain in the head and neck region that may be either a disorder in its own right or a symptom of an underlying medical condition or disease. The medical term for headache is cephalalgia. Headaches are one of the most common and univer...
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Irritability is an excessive response to stimuli.
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Red eyes are caused by enlarged, dilated blood vessels, leading to the appearance of redness on the surface of the eye.
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A headache is pain or discomfort in the head, scalp, or neck. Serious causes of headaches are extremely rare. Most people with headaches can feel much better by making lifestyle changes, learning ways to relax, and occasionally by taking medicatio...
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A headache involves pain in the head that can arise from many disorders or may be a disorder in and of itself.
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Watery eyes occur when there is too much tear production or poor drainage of the tear duct.
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Migraine is a type of headache marked by severe head pain lasting several hours or more.
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Paroxysmal hemicrania (PH) is a rare form of headache . Paroxysmal hemicrania usually begins in adulthood, and affected persons experience severe throbbing, claw-like, or boring pain . The pain is usually on one side of the face, near or in the ey...
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Migraine is a type of headache marked by severe head pain lasting several hours or more.
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Skin blushing or flushing is a sudden reddening of the face, neck, or upper chest.
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Pain in the eye (that is not due to injury) may be described as a burning, throbbing, aching, or stabbing sensation in or around the eye. It may also feel as if there is a foreign body in the eye.
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Allergic rhinitis is a collection of symptoms, mostly in the nose and eyes, which occur when you breathe in something you are allergic to, such as dust, dander, or pollen. This article focuses on allergic rhinitis due to outdoor triggers, such as ...
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Allergic rhinitis , more commonly referred to as hay fever , is an inflammation of the nasal passages caused by allergic reaction to airborne substances.
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Rhinitis is inflammation of the mucous lining of the nose.
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Rhinitis is inflammation of the mucous lining of the nose.
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Rhinitis is inflammation of the mucous lining of the nose.
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Allergic rhinitis , more commonly referred to as hay fever, is an inflammation of the nasal passages caused by allergic reaction to airborne substances.
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Nasal congestion refers to a stuffy nose.
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