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Raynaud's disease causes smaller blood vessels that supply blood flow to the skin to narrow in response to cold or stress. The affected body parts, usually fingers and toes, might turn white then blue. Depending on your skin color, these color changes may be harder or easier to see.
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The affected areas may feel cold and numb until blood flow improves, usually after warming up. You could have white coat hypertension. This means your blood pressure is higher at a healthcare professional's office than in other settings, such as at home. It's called white coat hypertension because people who measure blood pressure sometimes wear white coats.
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The stress of a health checkup may be the cause of white coat hypertension. It was once thought that if blood pressure goes up ... White blood cells come from the spongy tissue called bone marrow inside some of the larger bones. Conditions that affect the bone marrow are most often the causes of low white blood cell count. Overview Children with pediatric white blood cell disorders have too few or too many white blood cells.
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White blood cells, called leukocytes, are part of the immune system. They come from bone marrow and help fight infections. Several conditions can cause having too few or too many white blood cells. A low white blood cell count is a lower number of the cells in the blood that fight illness. What's thought of as low in a white blood cell count varies from one lab to another. This is because labs set their own reference ranges based on the people they serve.
A high white blood cell count most often means one of the following has led to a rise in white blood cells: An infection Reaction to a medicine A bone marrow condition An immune system issue Sudden stress such as hard exercise Smoking Specific causes of a high white blood cell count include: Wolff-Parkinson-White (WPW) syndrome is a heart condition present at birth. That means it's a congenital heart defect. Researchers aren't sure what causes most types of congenital heart defects. WPW syndrome may occur with other congenital heart defects, such as Ebstein anomaly.