Photo Credit George Doyle/Stockbyte/Getty Images. If a person experiences a drop in blood pressure, fever, diarrhea, loss of hydration from vomiting or dizziness, lightheadedness can occur. Further, if the brain does not receive enough blood, it can cause lightheadedness as well.eart Attack. Heart attack is one of the more serious conditions that cause lightheadedness. During a heart attack, oxygen is prevented from getting to the heart and the rest of the body when blood vessels are blocked, causing the head to feel light and weightless.
Screening for Osteoporosis. 1  An easy and painless procedure, an osteoporosis screening requires you to place your foot in an ultrasound device called a bone densitometer. 2  This device then measures the bone mineral density of your heel.steoporosis Screening/Bone Density Test. Osteoporosis is a disease in which bone becomes extremely fragile. Bone is a complex living tissue that can be weakened by poor diet and lack of exercise.
Osteoporosis Screening Discussion. Your doctorâs first step in screening you for osteoporosis will be to find out about your risk for the disease: He will talk to you about your personal health history and any family history of osteoporosis.When you visit your doctor, you should be ready to answer these kinds of questions:his is a machine that measures the bone mineral density (BMD) of your spine and your hips. The DEXA test is brief and painless, and involves lying flat for a few minutes while a wand-shaped device takes readings of your BMD from above.