A halo nevus is a mole with a white ring, or halo, around it and is sometimes known as Sutton's naevus or leukoderma acquisitum centrifugum.
Halo moles are not uncommon and are usually seen in children or young adults of either sex.
For reasons, which are unknown, the body selects a particular mole or moles for destruction.
This is presumably because the mole is recognized as being abnormal in some way.
The mole in the center of a halo is rarely malignant (cancerous) although all halo moles need to be examined carefully by an appropriate medical practitioner.
Sometimes halo moles are triggered by sunburn, which damages the mole and causes it to be recognized by the body as foreign.
Joke and Humors
How 1 to 10