Blue Nevi - Symptoms and Treatment

Blue Naevus or Nevus , is a special type of melanotic nevus. Blue Nevi are blue-black moles that are common in individuals of Asian descent.  It is a dark blue - black nevus covered by smooth skin and with minimal or without melanin pigmentation. Amelanotic cellular blue nevus is a cellular blue nevus. Blue nevi are solitary papules 2 mm to 1 cm in diameter or, less commonly, plaques, with a bluish color. Blue nevi are histologically similar to the Mongolian patch, commonly seen over the sacrum of Asian or African-American children. Blue rubber bleb nevus syndrome (BRBNS) is a rare disorder characterized by hemangiomas of the skin and gastrointestinal (GI) tract. Also called Jadassohn-Tièche nevus . The blue nevus, a benign, usually solitary lesion, represents a localized proliferation of dermal melanocytes. They vary greatly in appearance.  They can be flat, elevated, smooth, rough, polyp-like, or sessile.

Causes of Blue Nevi

Common Causes of Blue Nevi :-

• Certain medications may lead to blue nevi.
• Blue nevi is most common in winter seasons .
• UVA penetrates more deeply and efficiently - However, UVA's intensity also tends to be less variable both during the day and throughout the year as it varies for UVB's.
• Even small amounts of UV radiation trigger process leading to skin wrinkles.
• UVB is also the main cause of blue nevi, which affects the outer skin layers. UVB is most intense at midday when sunlight is brightest.
• Moles are the main cause in the formation of blue nevi.
• Melanoma is more likely to be caused by intense exposure to sunlight in early life.

Symptoms of Blue Nevi

Some common Symptoms of Blue Nevi :-

• Skin lumps may be seen during blue nevi.
• Skin colour get changed usually brown, black, bluish, or blue-gray.
• Skin lesion may occur in the affected area.

Treatment of Blue Nevi

• Cryotherapy is also very effective in the eradication of damaged partn of the skin.
• Cosmetic camouflage makeup can minimize the disfiguring facial pigmentation resulting from nevus of Ota.
• Ophthalmologist - For nevus of Ota, which may be associated with a higher incidence of ocular disease.
• Pulsed Q-switched laser surgery is very effective treatment for nevi of Ota and Ito, and it works via selective photothermal and photomechanical destruction of dermal melanocytes and melanophages.
• Microsurgery, is beneficial in acute conditions.

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