Nevus anemicus

Nevus anemicus is a rare type of birthmark that appears as a patch of skin that is paler than the surrounding skin. It is usually present at birth or appears in early childhood. Nevus anemicus is not associated with any known health risks and is generally considered a cosmetic concern.

Causes

The exact cause of nevus anemicus is unknown. It is thought to be caused by a localized hypersensitivity to catecholamines, chemicals that cause blood vessels to constrict. This results in a reduced blood flow to the area, causing the skin to appear paler.

Symptoms

Nevus anemicus is characterized by a patch of skin that is paler than the surrounding skin. The patch can be any size and is usually round or oval. It is most commonly found on the chest or back, but can appear anywhere on the body. The color of the patch does not change with cold or heat, unlike other types of birthmarks.

Diagnosis

Nevus anemicus is usually diagnosed based on its appearance. A dermatologist may use a device called a Wood's lamp to examine the skin. This device uses ultraviolet light to highlight areas of the skin that are different in color. A biopsy may be performed to rule out other conditions.

Treatment

There is no cure for nevus anemicus, and treatment is not usually necessary. If the appearance of the birthmark is a concern, makeup or self-tanning products can be used to camouflage it. In some cases, laser treatment may be used to reduce the appearance of the birthmark.

See also

• Birthmark
• Dermatology
• Skin condition

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