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.
Annarita, Guest. Waking Times. Feeling tired after you wake up and sleepy off and on during the day. There is something called the Triad Sleep Pattern that occurs for many: you sleep for about 2-3 hours, wake up, go back to sleep for another couple of hours, wake again, and go back to sleep again. For others, the sleep requirements have changed.