What is Nevus anemicus and explain in detail?
Nevus anemicus is a congenital disorder characterized by macules of varying size and shape that are paler than the surrounding skin and cannot be made red by trauma, cold, or heat. The paler area is due to the blood vessels within the area which are more sensitive to the body’s normal vasoconstricting chemicals.

Signs and symptoms
This benign patch appears on the skin at birth or in early childhood. In most people these are under 10 centimeters (3.9 in) in size. If there is doubt about the diagnosis, rubbing the area causes the skin around the lesion to become red while the lesion itself does not change in color