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  1. The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award ...

  2. 2023年10月26日 · Sciatica is a common type of pain affecting the sciatic nerve, a large bundle of nerves extending from your lower spinal cord, through your butt, and down the back of each leg. The telltale sign...

    • Keri Wiginton
    • Pathophysiology
    • Significance
    • Signs and symptoms
    • Overview
    • Prognosis

    A blood pressure reading appears as two numbers. The first and higher of the two is a measure of systolic pressure, or the pressure in the arteries when the heart beats and fills them with blood. The second number measures diastolic pressure, or the pressure in the arteries when the heart rests between beats.

    Optimal blood pressure is less than 120/80 (systolic/diastolic). In healthy people, low blood pressure without any symptoms is not usually a concern and does not need to be treated. But low blood pressure can be a sign of an underlying problem -- especially in the elderly -- where it may cause inadequate blood flow to the heart, brain, and other vi...

    Chronic low blood pressure with no symptoms is almost never serious. But health problems can occur when blood pressure drops suddenly and the brain is deprived of an adequate blood supply. This can lead to dizziness or lightheadedness. Sudden drops in blood pressure most commonly occur in someone who's rising from a lying down or sitting position t...

    Postural hypotension is considered a failure of the cardiovascular system or nervous system to react appropriately to sudden changes. Normally, when you stand up, some blood pools in your lower extremities. Uncorrected, this would cause your blood pressure to fall. But your body normally compensates by sending messages to your heart to beat faster ...

    The risk of both low and high blood pressure normally increases with age due in part to normal changes during aging. In addition, blood flow to the heart muscle and the brain declines with age, often as a result of plaque buildup in blood vessels. An estimated 10% to 20% of people over age 65 have postural hypotension.

  3. 2024年1月7日 · Dizziness is a feeling of being lightheaded, unsteady, and faint. It can make you feel like the world is spinning. Sometimes the feeling is mild and goes away quickly. Other times it can be severe...

  4. 2023年10月30日 · Doctors order a blood urea nitrogen (BUN) test to measure the amount of urea nitrogen in your blood. It helps them see how well your kidneys are working. A BUN test measures how much blood urea...

  5. 2024年1月8日 · The good news about gout is that you can control it. Medicines help in two ways: They reduce pain during an attack and can reduce the uric acid buildup that causes the condition. When uric acid ...

  6. 2024年4月2日 · Abdominal pain refers to discomfort or other uncomfortable sensations that you feel in your belly area. Just about everybody, at one time or another, will get a bellyache. Most causes of...

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