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.
Answer Wiki. Feeling sleepy is a message from your own body send to your mind. In translation - we need down time, so I (body) can do my maintenance task properly. It could be anything, but most likely it is generating vital energy. Tiredness is a physical stage after mental, emotional or physical action.