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Headache: Months
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The most common form of headache is the muscle-contraction or tension headache. It is characterized by dull, constricting pain that can either occur intermittently or continue for days, months, or years. Muscle-contraction headaches usually affect both sides of the head and may be described as having a hat-band distribution of pain.
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[One] of the headache types is that of Cluster headaches. This is a rare but very painful type of headache . The name of the headache occurs from the fact that the headache pain happens in clusters. Frequent periods of Cluster headaches may last weeks or months. This time period is followed by long periods headache -free time.
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The average length of a cluster headache is 45 minutes. They may occur between one and three times a day, and the cluster period may last from 6 to 12 weeks. The cluster headache period may cease for 6 to 12 months before recurring.
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TENSION HEADACHES Tension headaches are the most common headaches in the general population; other names for them include muscle contraction headache, ordinary headache, psychomyogenic headache, and stress headache. The IHS classifies tension headaches as either episodic or chronic; episodic tension headaches occur 15 or fewer times per month, whereas chronic tension headaches occur on 15 or more days per month over a period of six months or longer.
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