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. The affected areas may feel cold and numb until blood flow improves, usually after warming 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. 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.
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. The stress of a health checkup may be the cause of white coat hypertension. It was once thought that if blood pressure goes up ...
Wolff-Parkinson-White (WPW) syndrome is a heart condition present at birth. That means it's a congenital heart defect. People with WPW syndrome have an extra pathway for signals to travel between the heart's upper and lower chambers. This causes a fast heartbeat. Changes in the heartbeat can make it harder for the heart to work as it should.