Cluster headache produces a severe headache, varcharacterized by pain on one side of the head, or around one eye. Cluster headaches often recur at the same time each day. They may last for several days or weeks, with weeks or months of remission. 90% of those affected are males.
Causes of Headache, Cluster
Cause unknown, but may be due to a neurological disturbance of the body’s circadian rhythm (biologic clock) may contribute to cluster headache.
Signs and Symptoms of Headache, Cluster
Symptoms produced by cluster headaches include sudden onset of headache, often at night or while sleeping. The headache typically increases over about15 minutes and lasts about 2 hours. Usually, the pain is unilateral around the eye, severe, piercing or boring pain. It produces increased tearing of the eye on the side of the headache, red eye, and a swollen, drooping eyelid. Nasal congestion and runny nose frequently occur. The heart beat may be slow, with episodes of anxiety, sweating, restless, or, rarely, violent behavior.
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