By Rajeshwaari Kalla | August 18, 2025 |  Image: Canva

Cluster headaches: Causes, symptoms, how to improve sleep

Nighttime attacks

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Cluster headaches often strike  during sleep, waking people up  in the first few hours of rest

REM stage link

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Many attacks occur during REM sleep,  a deep sleep phase when brain activity and dreams are the strongest

Precise timing

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Headaches often come at the same  time every night, showing a strong connection to internal rhythms

Sleep disturbance

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Painful nighttime attacks disrupt sleep quality, leading to fatigue, poor focus, and lower energy during the day

Circadian rhythm connection

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Cluster headaches follow daily  biological cycles controlled by  the body’s circadian clock, which  regulates sleep and alertness

Melatonin as treatment

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Melatonin, a hormone linked to sleep, may help reduce the frequency of cluster headache attacks in some

Sleep apnea risk

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Some studies suggest a link between sleep apnea and cluster headaches, though more research is still needed

Irregular sleep triggers

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Inconsistent sleep schedules, oversleeping, or lack of sleep may trigger or worsen cluster headache attacks

Shift work issues

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Working night shifts or changing sleep patterns often can increase the risk of more frequent headache episodes

Healthy routine helps

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Maintaining a consistent bedtime and wake time may reduce the number of cluster headache attacks experienced

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