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.
Feeling sleepy and tired all the time can be a sign of fatigue. Tiredness and fatigue can manifest in a number of ways. According to eMedicineHealth, fatigue can cause weakness, dizziness, tiredness, shortness of breath and even palpitations.
Some people experience fatigue due to what's known as unrefreshing sleep. This means you've had enough sleep -- usually seven or more hours -- but you wake up and still feel tired, because the sleep was of poor quality, interrupted, or did not reach restorative levels.