What causes the red mark on the skin after sitting in one position for too long?

Example: Supported in hand while surfing Internet, after a while, it is a red mark on his face. Fades with time. I want to know what the current process is below the skin. Why will turn red and disappear over time?

is just one sign of pressure when pressure is applied anywhere in the body than the force of blood to return to the route in that area or slow its course and once you move the object outside the area of the blood returns (usually) and returns to its normal color

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Mark Twain (DVD) $14.84 Born Samuel Clemens in Hannibal, Missouri, Mark Twain became one of America`s best known and best loved authors. His novels such as THE ADVENTURES OF HUCKLEBERRY FINN and TOM SAWYER are still read by millions today. His social commentary is also just...