Nighttime headaches can have many causes. One type of nighttime headache is hypnic headache. ... Less common but more serious causes of nighttime headaches may include:
www.mayoclinic.com/health/nighttime-headaches/AN00992 www.mayoclinic.com/health/nighttime-headaches/AN00992
Migraine triggers; Whatever the exact mechanism of the headaches, a number of things may trigger them. Common migraine triggers include: ... Fluctuations in estrogen seem to trigger headaches in many women with known migraines. Women with a history of migraines often report ... Nighttime headaches: What causes them?
www.mayoclinic.com/health/migraine-headache/DS00120/DSE... www.mayoclinic.com/health/migraine-headache/DS00120/DSECTION=causes
One of the more obvious causes of nighttime headaches is alcohol consumption, so if you find this is a trigger, it is suggested that you limit consumption or avoid those specific alcoholic drinks that seem to trigger headaches more often.
www.headacheexpert.co.uk/HeadachesDuringTheNight.html www.headacheexpert.co.uk/HeadachesDuringTheNight.html
There are other causes of nighttime headaches and some of them are serious.  Sleep apnea is a serious problem that causes headaches during sleep.  A machine may be indicated to check your sleep habits.  Sleep apnea is a dangerous problem if left untreated.
easyphamax2u.wordpress.com/2008/07/06/what-causes-night... easyphamax2u.wordpress.com/2008/07/06/what-causes-nighttime-headaches/
Common Questions About Headaches and Migraines ... What are Common Tension Headaches Triggers? ... What Causes Nighttime Headaches?
health.msn.com/health-topics/pain-management/headaches/ health.msn.com/health-topics/pain-management/headaches/
Nighttime headaches can have many causes — some potentially serious. ... Q: What causes nighttime headaches? ... Less common but more serious causes of nighttime headaches may include:
health.msn.com/health-topics/pain-management/headaches/... health.msn.com/health-topics/pain-management/headaches/articlepage.aspx?cp-documentid=100100316
This sort of problem can be very difficult to deal with, and I do sympathise. Headaches are not a very common symptom in young children, and headache at night less so. ... Get expert advice on what causes this problem and ways to stop snoring.
www.netdoctor.co.uk/ate/neurology/201405.html
The causes of chronic daily headaches are not well understood. Some may be caused by various underlying diseases or conditions, including: ... In most cases, however, chronic daily headaches don't have an underlying physical cause. They may occur if you develop a heightened response ... Nighttime headaches: What causes them?
mayoclinic.com/health/chronic-daily-headaches/DS00646/D... mayoclinic.com/health/chronic-daily-headaches/DS00646/DSECTION=3
The exact cause or causes of tension headache are unknown. Experts used to think that the pain of tension headache stemmed from muscle contraction in the face, neck and scalp, perhaps as a result of heightened emotions, tension or stress. ... Nighttime headaches: What causes them?
mayoclinic.com/health/tension-headache/DS00304/DSECTION... mayoclinic.com/health/tension-headache/DS00304/DSECTION=3
External Compression Headaches Mayo Clinic; ... Ice Cream Headaches Mayo Clinic; ... Nighttime Headaches: What Causes Them? Mayo Clinic;
www.noah-health.org/en/bns/disorders/headache/types/gen... www.noah-health.org/en/bns/disorders/headache/types/general.html