By Mayo Clinic Staff. An X-ray is a quick, painless test that produces images of the structures inside your body â particularly your bones. X-ray beams pass through your body, and they are absorbed in different amounts depending on the density of the material they pass through.
Physical Causes. The most obvious reason for being tired and sleepy is lack of sleep. According to MayoClinic.com, the average adult needs between seven and eight hours of sleep every day. If you're sleeping less than that, adjusting your sleeping schedule might provide some relief.
Depriving yourself of sleep can cause a lot more stress on your body than you think! The two hormones, leptin and ghrelin, regulate your feelings of hunger and fullness. Without enough sleep, these two hormones can act up, causing you to think you are hungry when you aren't.