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.
1 If you must take a nap, do not sleep for more than an hour at a time. 2  Longer naps will make you feel more tired, and may contribute to sleep problems such as insomnia. 3  If it's okay with your doctor, try some mild to moderate exercise during the day.