Cluster headache, nicknamed "suicide headache", is a neurological disease that involves, as its most prominent feature, an immense degree of pain. "Cluster" refers to the tendency of these headaches to occur periodically, with active periods interrupted by spontaneous remissions. The cause of the disease is currently unknown. It affects approximately 0.1% of the population, and men are more commonly affected more than women.
Contents [hide]
1 Signs and symptoms
1.1 Pain
1.2 Other symptoms
1.3 Cyclical recurrence and regular timing
1.3.1 Episodic or chronic
2 Other names
3 Prevalence
4 Pathophysiology
4.1 Hypothalamus
4.2 Genetics
4.3 Triggers
4.4 Smoking
5 Treatment
5.1 Abortive treatment
5.2 Prophylactic treatment
5.3 Non-established and research approaches
6 Other types of headache
7 See also
8 References
9 External links
[edit] Signs and symptoms
Cluster headaches are excruciating unilateral headaches,[1] of extreme intensity.[2] The duration of the common attack ranges from as short as 15 minutes to three hours or more. The onset of an attack is rapid, and most often without the preliminary signs that are characteristic of a migraine. However, some sufferers report preliminary sensations of pain in the general area of attack, often referred to as "shadows", that may warn them an attack is imminent. Though the headaches are almost exclusively unilateral, there are many documented as cases of "side-shifting" between cluster periods, or, even rarer, simultaneously (within the same cluster period) bilateral headache. They are often initially mistaken for brain tumors and multiple sclerosis until patients are treated with corticosteroids and then imaged. Trigeminal neuralgia can also bring on headaches with similar qualities.
[edit] Pain
The degree of pain involved in cluster headaches is markedly greater than in other headache conditions, including severe migraines, and experts believe that it may be the most severe pain known to medical science. It has been described by female patients as being more severe than childbirth.[3] Dr. Peter Goadsby, Professor of Clinical Neurology at University College, London, a leading researcher on the condition has commented, “Cluster headache is probably the worst pain that humans experience. I know that’s quite a strong remark to make, but if you ask a cluster headache patient if they’ve had a worse experience, they’ll universally say they haven’t. Women with cluster headache will tell you that an attack is worse than giving birth. So you can imagine that these people give birth without anesthetic once or twice a day, for six, eight or ten weeks at a time, and then have a break. It’s just awful.” [1] The pain is lancinating or boring in quality, and is located behind the eye (periorbital) or in the temple, sometimes radiating to the neck or shoulder. Analogies frequently used to describe the pain are a red-hot poker inserted into the eye, or a spike penetrating from the top of the head, behind one eye, radiating down to the neck, or sometimes having a leg amputated without any anaesthetic. The condition was originally named Horton's Neuralgia after Dr. B.T Horton, who postulated the first theory as to their pathogenesis. His original paper describes the severity of the headaches as being able to take normal men and force them to suicide. Indeed, cluster headaches are also known by the nickname "suicide headaches".
From Horton's 1939 original paper on cluster headache:
Our patients were disabled by the disorder and suffered from bouts of pain from two to twenty times a week. They had found no relief from the usual methods of treatment. Their pain was so severe that several of them had to be constantly watched for fear of suicide. Most of them were willing to submit to any operation which might bring relief.
[edit] Other symptoms
The cardinal symptoms of the cluster headache attack are ptosis (drooping eyelid), conjunctival injection (redness of the conjunctiva - the covering of the eyeball), lacrimation (tearing), rhinorrhea (runny nose), and, less commonly, facial blushing, swelling, or sweating. These features are known as the autonomic symptoms. The attack is also associated with restlessness, the sufferer often pacing the room or rocking back and forth. Less frequently, he or she will have an aversion to bright lights and loud noise during the attack. Nausea is sometimes accompanied with a cluster headache, though it has been reported. The neck is often stiff or tender in the aftermath of a headache, with jaw or tooth pain sometimes present. Some sufferers report feeling as though their nose is stopped up and that they are unable to breathe out of one of their nostrils.
[edit] Cyclical recurrence and regular timing
Cluster headaches are occasionally referred to as "alarm clock headaches", because of its ability to wake a person from sleep, and because of the regularity of its timing in that both the individual attacks and the clusters themselves can have a metronomic regularity; attacks striking at a precise time of day each morning or night is typical, even precisely at the same time a week later. This has prompted researchers to speculate an involvement of the brain's "biological clock" or circadian rhythm.
[edit] Episodic or chronic
In episodic cluster headache, these attacks occur once or more daily, often at the same times each day, for a period of several weeks, followed by a headache-free period lasting weeks, months, or years. Approximately 10–15% of cluster headache sufferers are chronic; they can experience multiple headaches every day for years.
Cluster headaches occurring in two or more cluster periods lasting from 7 to 365 days with a pain-free remission of one month or longer between the clusters are considered episodic. If the attacks occur for more than a year without a pain-free remission of at least one month, the condition is considered chronic.[4] Chronic clusters run continuously without any "remission" periods between cycles. The condition may change from chronic to episodic and from episodic to chronic. Remission periods lasting for decades before the resumption of clusters have been known to occur.
[edit] Other names
The first complete description of cluster headache was given by the London neurologist Wilfred Harris in 1926. He named the disease Migrainous neuralgia.[5][6][7]
Cluster headaches have been called by several other names in the past including Erythroprosopalgia of Bing, Ciliary neuralgia, Erythromelagia of the head, Horton's headache (named after Bayard T. Horton, an American neurologist), Histaminic cephalalgia, Petrosal neuralgia, sphenopalatine neuralgia, Vidian neuralgia, Sluder's neuralgia, and Hemicrania angioparalyticia.[8] Sluder's neuralgia (syndrome) and cluster pain can often be temporarily stopped with nasal lidocaine drops.[9][10]
Robert Bing (1878–1956)
Bayard T. Horton (1895–1980)
[edit] Prevalence
While migraines are diagnosed more often in women, cluster headaches are diagnosed more often in men. The male-to-female ratio in cluster headache ranges from 4:1 to 7:1. It primarily occurs between the ages of 20 to 50 years. [2]This gap between the sexes has narrowed over the past few decades, and it is not clear whether cluster headaches are becoming more frequent in women, or whether they are merely being better diagnosed. Limited epidemiological studies have suggested prevalence rates of between 56 and 326 people per 100,000.[11] Latitude plays a role in the occurrence of cluster headaches, which are more common as one moves away from the equator towards the poles.
[edit] Pathophysiology
Gray's FIG. 778– Trigeminal nerve is shown in yellow.
Gray's FIG. 777– Detailed view of ophthalmic nerve, shown in yellow.
Cluster headaches are classified as vascular headaches. The intense pain is caused by the dilation of blood vessels which creates pressure on the trigeminal nerve. While this process is the immediate cause of the pain, the etiology (underlying cause or causes) is not fully understood.
[edit] Hypothalamus
Among the most widely accepted theories is that cluster headaches are due to an abnormality in the hypothalamus; Dr Goadsby, an Australian specialist in the disease has developed this theory. This can explain why cluster headaches frequently strike around the same time each day, and during a particular season, since one of the functions the hypothalamus performs is regulation of the biological clock. Metabolic abnormalities have also been reported in patients.
The hypothalamus is responsive to light—daylength and photoperiod; olfactory stimuli, including pheromones; steroids, including sex steroids and corticosteroids; neurally transmitted information arising in particular from the heart, the stomach, and the reproductive system; autonomic inputs; blood-borne stimuli, including leptin, ghrelin, angiotensin, insulin, pituitary hormones, cytokines, blood plasma concentrations of glucose and osmolarity, etc.; and stress. These particular sensitivities may underlay the causes, triggers, and methods of treatment of cluster headache.
Cluster headaches
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Originally Posted by Seneca
