Overview

Migraine is a neurological syndrome characterized by altered bodily experiences, painful headaches, and nausea. It is a common condition which affects women more frequently than it does men.

The typical migraine headache is one-sided and pulsating, lasting 4 to 72 hours. Accompanying complaints are nausea and vomiting, and a heightened sensitivity to bright lights (photophobia) and noise (hyperacusis). Approximately one third of people who experience migraine get a preceding aura, in which a patient may sense a strange light or unpleasant smell. Patients often describe triggers they feel precipitate an episode of migraine, such as certain foods and beverages (like chocolate or alcohol), stress or menstruation. In some migraine types there are typical features but the headache remains absent, and in children abdominal pain may be a prominent feature.

Although the exact cause of migraine remains unknown, the most widespread theory is that it is a disorder of the serotonergic control system. Genetic factors may also contribute. Studies on twins show that genes have a 60 to 65% influence on the development of migraine. Fluctuating hormone levels show a relation to migraine in several ways: three quarters of adult migraine patients are female while migraine affects approximately equal numbers of boys and girls before puberty,[citation needed] and migraine is known to disappear during pregnancy in a substantial number of sufferers.

The treatment of migraine begins with simple painkillers for headache and anti-emetics for nausea, and avoidance of triggers if present. Specific anti-migraine drugs can be used to treat migraine. If the condition is severe and frequent enough, preventative drugs might be considered.

The word migraine is French in origin and comes from the Greek hemicrania, as does the Old English term megrim. Literally, hemicrania means "half (the) head".

Sunday, July 5, 2009

Know what headache and stress is all about


About tension headache


More than 300 known medical disorders can produce headaches. Primary headaches include migraine, tension-type and cluster headache. Furthermore, about 90% of the people who see a doctor for headaches will generally have one of the above mentioned types of headaches. Primarily, headaches are considered to be harmless, but there recurrence can be an issue for many people.



Tension headaches are further divided into episodic or chronic with the presence or absence of pericranial muscle tenderness (pain on the outside of the skull).


People with episodic tension-type headaches will normally have a history of at least 10 previous headache episodes lasting from 30 minutes to 7 days but occurring fewer than 180 times a year. This type of headache must have at least two of the following characteristics like:


  • Pressing/tightening (non-pulsating) quality, located on both sides of the head

  • Mild or moderate intensity

  • Not aggravated by routine physical activity

  • No nausea or vomiting

  • Possible sensitivity to light or sound but not both



People with chronic tension-type headache have an average headache frequency of 15 days a month or 180 days a year for 6 months. In addition, these people must also meet the criteria for episodic tension-type headache. Moreover, people suffering from chronic tension-type headache must not be suffering from another disorder that is easily detected by a physical and neurological examination.


How to detect a headache caused by stress and tension


Diagnosis of most tension-type headaches, are based on a person's medical history as well as a complete and comprehensive physical examination. It is understood that no further diagnostic studies are needed for these people who present with normal neurological examination findings and are otherwise healthy.


On the contrary, people with chronic tension-type headache, must undergo a CT scan and an MRI, regardless of what their neurological examination findings are. Although this medically advanced imaging may rarely help in diagnosing a specific type of headache syndrome, it may definitely prove invaluable in excluding other causes of headaches. Moreover, it is essential that tests like thyroid function studies, complete blood cell count, and metabolic screening also be performed to ascertain the cause of the headache.


Causes of headache and stress


The onset of tension-type headaches is generally associated with stress or upsetting emotional situations. However, studies involving these factors have not been shown to lead to muscle contraction or reduced blood flow to the head. Nonetheless, people may suffer from tenderness of the muscles surrounding the head region. Therefore, it can safely be assumed that tension-type headaches are not a result of sustained muscle contraction.



According to existing evidence, which is also the most convincing; deliberation of the issue has led the researchers to conclude that a central nervous system dysfunction is the underlying cause of most tension-type headaches. As a consequence, muscle aches during tension-type headaches are thought to be a result of increased sensitivity of the nervous system. Moreover, these muscle pains are a result of occasional or long-term imbalances in brain chemicals known as neurotransmitters (serotonin, dopamine, norepinephrine, enkephalins).



Studies have revealed that some people with primary headache disorders may respond to medications that are designed to specifically target and influence serotonin levels in the brain. Positive response is generally seen in people suffering primarily from migraines or cluster headaches. On the contrary, people who are not afflicted with migraine or cluster headache do not respond positively to serotonin-targeted drugs.



Similarly, there is a possibility that people with chronic tension-type headaches may also have neurochemical imbalances in their body. In fact, depression may also be an essential factor in a certain number of people with chronic tension headaches. Furthermore, sleep disorders could also be linked to serotonin depletion.


Headache medication


Prescription-strength pain relievers may be given once the doctor has a better understanding of a person's headache as well as the various other coexisting medical conditions that a patient may present with. However, care must be taken to prevent people from becoming dependent on strong narcotic drugs, especially when headaches are not a one-time thing but tend to recur at regular intervals.


For headaches, doctors may first prescribe pain relievers like:


  • Nonsteroidal anti-inflammatory drugs (NSAIDs)

  • Triptans

  • Ergots

  • Anti-nausea medications

  • Butalbital combinations

  • Opiates



However, pain that cannot be controlled with pain relievers, doctors may prescribe preventive therapy such as:


  • Cardiovascular drugs (Beta blockers, Calcium channel blockers and antihypertensive drugs)

  • Antidepressants

  • Anti-seizure drugs

  • Cyproheptadine

  • Botulinum toxin type A (Botox)




Autor: Mark Bevan

Webmaster associated with headache related site headclinic.co.uk. This site provides various information on migraine, tension headache and hay fever treatment. Resources are available on site headclinic.co.uk


Added: July 5, 2009
Source: http://articlerich.com/Article/-Know-what-headache-and~

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