Cloudy urine can be caused by a variety of conditions, including vaginal discharge, sexually transmitted diseases, dehydration, certain autoimmune disorders, as well as infection, inflammation, or other conditions of the urinary tract (kidneys, ureters, bladder and urethra).loudy urine can be caused by a variety of conditions, including vaginal discharge, sexually transmitted diseases, dehydration, certain autoimmune disorders, as well as infection, inflammation, or other conditions of the urinary tract (kidneys, ureters, bladder and urethra).
Blood cholesterol, triglyceride and glucose levels are the most common tests that require fasting. Vitamin levels, such as vitamin E or A, also need to be drawn when the patient is fasting. Typically at least a 12-hour fast is required for cholesterol and triglyceride screenings.
When you have routine checkups, your doctor may recommend blood tests to see how your body is working. Many blood tests don't require any special preparations. For some, you may need to fast (not eat any food) for 8 to 12 hours before the test. Your doctor will let you know how to prepare for blood tests. During a blood test, a small sample of blood is taken from your body. It's usually drawn from a vein in your arm using a needle. A finger prick also might be used.