A nevus is a benign (non-cancerous) melanocytic tumor, more commonly called a mole.

See a dermatologist if you find a suspicious mole on your child’s body. Rest assured that learning to talk a little later than other children shouldn't affect how your child develops later on. Most kids are born without moles, called "nevi" by dermatologists, but a recent Colorado study of 681 white children found that every beach vacation leads to a five percent increase in small moles on children's skin. A cherry angioma is a mole-like skin growth made up of small blood vessels, or capillaries. The age at which children learn to talk can vary widely. 3. As the child grows, the moles will naturally get bigger. Most, but not all children, can say at least six words by 18 months. However, very large moles or moles that change in size, color, or shape need to be checked out by your doctor. Try not to worry if your toddler isn't talking at 18 months. ... Should I worry about a mole?
“This can distress the child and even transmit some anxiety and fear to the child.” Nevi (the plural of nevus) are not usually present at birth but begin to appear in children and teenagers. Some moles fade away. Moles on a child’s skin are generally nothing to worry about.

(Some doctors use the term "atypical mole" to refer to a dysplastic nevus.)
“If a mole on your child’s skin suddenly changes size, shape or color or bleeds, or it starts to get bigger, make an appointment with a dermatologist to look at it,” he advises. A dysplastic nevus is a type of mole that looks different from a common mole. It’s also normal for moles on a child’s skin to darken or lighten. It is not uncommon to find a mole on your baby.

“It may need to be removed with a scalpel.” New moles appear during childhood and adolescence. These changes are common and rarely “This can cause them stress and anxiety if they are a parent and hovering over a child’s every mole or spot,” says Dr. Frieling. It is usually more than 5 millimeters wide (1, 3). A summer vacation often means fun in the sun and water, but it can also mean an increase in the chances of developing a dangerous mole. But at the same time, it’s crucial to keep things in perspective and be realistic rather than a worry wort. Most moles are harmless. A dysplastic nevus may be bigger than a common mole, and its color, surface, and border may be different. Asymmetry: One half of the mole doesn’t look the same as the other half (healthy moles are symmetrical) Border: Moles that have jagged, poorly defined borders Color: Moles that contain multiple colors (healthy moles should be a single color)