If you have a tension headache, place a heating pad on your neck or the back of your head. If you have a sinus headache, hold a warm cloth to the area that hurts. A warm shower might also do the trick.
Sleep deprivation takes a sharp toll on the human brain and body, impairing cognition, motor ability, and mood. Willpower, memory, judgement, and attention all suffer. You drop and bump into things, crave sugar, overeat, and gain weight. You're more irritable, more anxious, overly negative, and more emotionally reactive.
The chemistry of the brain changes when a person takes a regular intake of caffeine, as it grows more adenosine receptors.
Eventually, it takes more caffeine to feel the effects, and as there are now more receptors, not having a stimulant results in ‘caffeine withdrawal headache’ and other symptoms due to the original molecule connecting to the increased number of receptors in the brain.