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.
Habits. Sleep: If you are feeling tired, you may get into the habit of sleeping in the day. This can make it more difficult to 'switch off' at night and get a good night's sleep. Sleeping too much: it sounds odd, but this too can make you tired-perhaps because it reduces your fitness.abits. Sleep: If you are feeling tired, you may get into the habit of sleeping in the day. This can make it more difficult to 'switch off' at night and get a good night's sleep. Sleeping too much: it sounds odd, but this too can make you tired-perhaps because it reduces your fitness.