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.
The first thing you should know is, feeling sleepy in the afternoon is normal. It doesn't mean you had a big lunch, or that you're depressed, or you're not getting enough exercise. That's just how animals' cycles work -- every 24 hours, we have two periods of intense sleepiness.