Among the various types of headaches that are experienced by people around the world, cluster headaches are generally the most rare and uncommon. The headaches are usually short-lived and occur out of a sudden. A significant cluster headaches symptom is the severe pain around on the the eyes.
As the name suggests, cluster headaches often come in a group or cluster and the victim can suffer several headaches in a day for weeks or even months. This condition can be very disruptive and the patient is often unable to focus on his or her work. The headache-free period between the attacks also varies between different victims. According to a study, most headache victims suffer from tension headaches or migraines than cluster headaches.
This headache can also be classified into 2 categories as follows:
Episodic
An episodic cluster headache usually occur in cycles lasting from 7 days to 1 year. The clusters are typically seperated by headache-free intervals last at least 2 weeks. The cluster headaches will usually last 2 weeks to 3 months.
Chronic
Chronic cluster headaches are more critical and they occur for more than a year without any headache-free intervals or with intervals lesser than 2 weeks. A chronic cluster headache is also very difficult to treat as the standard medications are often not effective against them.
To learn more about cluster headaches, read up at http://www.frequent-headaches.com/cluster-headache.html.
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