Normally, When Pressing On The Skin With A Finger With A White Mark And A Few Moments Back To Normal?
Hello, I pressed my arm with my finger then the marks were white until a while later the color returned to normal … Why did that happen? Is that normal?
Hello, thank you for the question to HealthReplies.com
This is a very normal thing to happen. On your skin there are very small blood vessels called capillaries. The presence of capillary blood vessels near the surface of your skin serves to provide oxygen and nutrients for your skin and in addition it will also give a reddish color to your skin (besides the skin color that does exist because of the melanin pigment in your skin). When you press your skin with your fingers, these capillary blood vessels will be compressed and collapse for a while (so that the color of your skin will turn paler) before it will eventually fill with blood (and your skin color will be the same as before). This does not indicate you are dehydrated.
If you do this test at your fingertips (an examination called a CRT / capillary refill time), you can measure how long your blood capillary refill after the tip of your finger is pressed. If the CRT is prolonged (normally less than 2 seconds), then this can indicate impaired perfusion, shock, dehydration, peripheral arterial disease, etc.
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