The body has mechanisms to alter or maintain blood pressure and blood flow. There are sensors that sense blood pressure in the walls of the arteries... My WebMD Sign In, Sign Up
Perhaps while we're not watching, the denizens of Dark Shadows carry-on, caught in another inter-dimensional wing of Collinwood. If you peer out the corner of your eye, you may catch a glimmer of this shadowy activity, perhaps in Dark Shadows Collection 14, or Dark Shadows Collection 22.
Age â As you age, your private areas naturally turn dark. This is attributed to hormonal changes. Genetics â You may inherit genes that cause dark skin in your private areas. Pregnancy â While you may not have dark skin in your private areas, you may develop the same during pregnancy.