You could be dehydrated or hungover from alcohol.
It could be a caffeine addiction withdrawal: http://www.hopkinsmedicine.org/Press_releases/2004/09_29_04.html
You might also have sleep apnea, whereby your breathing gets obstructed (from bad snoring, for example) and you don't get enough oxygen to the brain while sleeping. Usually this can be determined by a sleep study, and, if you have apnea, there are mechanisms to be used to help keep you breathing smoothly during the night. http://www.nhlbi.nih.gov/health/dci/Diseases/SleepApnea/SleepApnea_WhatIs.html or it could be the jolt of sitting up suddenly in the morning. some scientists think that the jolt can give you a headache and make you bad tempered.
Cluster headaches are occasionally referred to as "alarm clock headaches" because of their ability to wake a person from sleep and because of the regularity of their timing: both the individual attacks and the clusters themselves can have a metronomic regularity; attacks striking at a precise time of day each morning or night is typical, even precisely at the same time a week later. The clusters tend to follow daylight saving time changes and happen more often in spring and fall equinox. This has prompted researchers to speculate an involvement of the brain's "biological clock" or circadian rhythm.
In over 85% of affected persons, the most universal symptom is headache. The headache is severe and tends to be on one side (unilateral), and worsens at night.
It is common for some types of headache to present at night or while sleeping. Migraine often comes with nausea and intestinal upset. In the case of a severe or new type of headache, or changed headache, it is prudent to see a qualified physician, especially a Headache Specialist.
The Earth rotating causes day and night, it rotates every 24 hours. The Earth rotating causes day and night, it rotates every 24 hours.
the same thing that causes day and night on every other planet - it rotates.
If you have a headache off and on during both the day and night as well as feeling hot, it is best to consult a doctor.
headache
eucaliphtus oil and 2 minute massage every night
The Earth spinning every 24 hours causes day and night. The Moon has nothing to do with causing day or night. In fact, the moon spends just as much time in the daytime sky every month as it does in the night-time sky.
The song is SPANKOX - To The Club
The first sign of Vitamin A deficiency is night blindness. Severe Vitamin A deficiency can cause Xerophthalmia (dry eye in which the eyes cannot produce tears) and complete blindness.
So it is not really possible because It causes headache, so it can force you to sleep It affects your eyesight and makes you dizzy so you might possibly want to sleep
marijuana makes you sleepy!the ancient Indians used it in the pipe of peace every night in order to relax!!