Causes
A blue nevus forms when pigment‑producing cells end up deeper in the skin than usual and cluster there. Genetics, UV exposure, and hormonal changes may all play a role, but there is no single proven cause.
Harmless & Common
Blue mole
Blue nevus
Risk Level: Low Risk
Frequency
Rare
Age Group
All Ages
Progression
Self-Limiting
Contagious
No
A blue nevus is a benign mole that looks blue to blue‑black because the pigment sits deeper in the skin. It usually appears as a small, smooth, round spot or bump, most often on the trunk, limbs, or neck, and tends to grow slowly and then stay stable for years.
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Risk Factors
Most blue nevi are completely benign and stay stable for life. The risk of melanoma developing in a blue nevus is low but slightly higher than in a typical brown mole, so any visible change or new symptoms should be checked.
Treatment
If a blue nevus looks typical and does not change, no treatment is needed other than regular monitoring. When removal is needed—for example, if it changes, is repeatedly traumatized, or looks atypical—it is usually cut out surgically and sent for histology; laser or freezing methods are not recommended.
Medical Disclaimer
The information provided here is for educational purposes only and does not replace professional medical advice. Always consult a dermatologist or physician if you have any concerns.
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