Blue nevus (lat. n. caerules) is one of the types of nevi, which is a benign pigmented formation of the skin. This nevus is quite common, but usually goes away without any problems or treatment. Despite this, the presence of any nevus requires observation throughout life.
Nevus Blue has clear boundaries and can have various shades, from blue to black. It occurs mainly on the face: forehead, cheeks, nose, chin. Rarely, Blue nevus may appear on the neck, shoulders or chest. In most cases it is small and does not exceed 3 cm in diameter. In rare cases, nevi can be quite large in size, which is especially true