Halo nevus is a nevus surrounded by a depigmented ring. Because halo nevus are only of cosmetic significance, treatment is usually not required, and patients are typically asymptomatic.

Although halo nevus are harmless in most cases, the lesion should be monitored regularly. If any change in appearance occurs or if the lesion becomes painful, a doctor should be consulted promptly to rule out melanoma.

Halo nevus are estimated to occur in about 1 % of the general population and are more common in individuals with vitiligo, malignant melanoma, or Turner syndrome. The average age of onset is during the teenage years.