Feeling dizzy or faint can be linked with such a wide array of causes like an underlying medical condition, low blood sugar level, excessive alcohol consumption, lack of sleep, etc.., that its accurate diagnosis and relative treatment has become a must. In most cases, dizziness is eliminated from medical investigation by doctors as an insignificant symptom of conditions such as pregnancy, emotional shock or stress, side effects of certain drugs, etc. The true cause of faintness can be diagnosed via proper study of clinical history and investigation. It may not necessarily require hospital admission (view rates of hospital wards here, here, and here).
