Moles are brown or black growths, usually round or oval, that can appear anywhere on the skin. They can be rough or smooth, flat or raised, single or in multiples. They occur when cells that are responsible for skin pigmentation, known as melanocytes, grow in clusters instead of being spread out across the skin. Generally, moles are less than one-quarter inch in size. Most moles appear by the age of 20, although some moles may appear later in life. Most adults have between 10 and 40 moles. Because they last about 50 years, moles may disappear by themselves over time.
There is no evidence that removing a skin tag will cause more tags to grow. There is no expectation of causing skin tags to "seed" or spread by removing them. In reality, some people are simply more prone to developing skin tags and may have new growths periodically. Some individuals request periodic removal of tags at annual or even quarterly intervals.
Moles are the result of the accumulation of melanocytes, or pigmented cells, in a localized area. Referred to as nevi, moles come in all shapes, sizes, and a variety of colors. Some may be very light and barely noticeable, while others are red, brown, or black, making them difficult to disguise. Typically, moles are considered harmless growths. However, they may present cosmetic concerns depending on where they are.