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Halo moles are moles with circles of white skin that looks like a ring around it. The white ring or halo is seldom seen in younger children. Also known as Sutton's naevus, halo moles are seen in people suffering from vitiligo or loss of skin color. The de pigmentation surrounding the moles occur when the immune cells invades the mole. The appearances of halo moles are abnormal occurrence and for this reason you need to see a dermatologist for further investigation. Genes or heredity often causes halo moles.
For some unknown reasons, the T cells and the antibody surrounding the moles attack the dark skin pigments and reduce its color until it totally fades out and eventually disappear. The remaining darker spots in the middle make it obvious that the outside portion id whiter as a result of the attack eating out its skin color or melanin. If all the color disappears the remaining color in the skin is purely white. Usually the resulting halo is measures approximately 5-10 mm in diameter. The occurrence of halo moles is mostly seen in the areas of the body such as the trunk but not common in the head.
For halo moles usually no treatment is necessary however halo moles may occur in people with malignant melanoma conditions. It is also possible that with the existing halo moles another mole close to the area could be experiencing symptoms of melanoma. This mole could change its size, shape, color and appearance and has to be evaluated by the doctor immediately. It is also a good idea to examine the skin at home using a simple ABCD rule to make sure if the moles remain stable and normal. If you noticed some signs of halo moles check your moles regularly and have a regular check up with your dermatologist.
Sometimes halo moles are caused by too much exposure to the sun. If the whole mole becomes halo there is no need for treatment. Eventually it will regain its coloring pigment at some point and will come back to its normal skin color once again. Although halo moles are harmless and not contagious, just bear in mind to practice anti-sun protection all the time. Wear sunscreen, proper clothing and shield your skin from direct UV radiation by staying under the shady trees or tall buildings while outdoors.