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.
Serotonin and Tryptophan. Serotonin and tryptophan may be the reason you feel sleepy after Thanksgiving turkey and mashed potatoes. Carbohydrates allow your brain to produce serotonin, a chemical that allows for calm and pleasant moods, while making tryptophan, the chemical responsible for sleepiness, more available to your brain.