Halo nevus is a nevus that is surrounded by a depigmented ring. As halo nevus are only of cosmetic significance, no treatment is required in most cases, and patients will be asymptomatic.

Although halo nevus are harmless in most circumstances, it is important to monitor the lesion on regular basis. If there is any change in appearance of the lesion or is associated with pain, a doctor should be consulted immediately to exclude the possibility of melanoma.

Halo nevus are estimated to be present in approximately 1% of the general population, and are found to be more prevalent in people with vitiligo, malignant melanoma, or Turner syndrome. The average age of onset is in a person's teenage years.