Skin tags or moles can sometimes indicate underlying health concerns, so it's important to be aware of them. Generally, moles are black patches of skin that can appear anywhere on the body, and skin tags are small soft growths that hang off the skin. Unfortunately, these can also serve as breeding grounds for bacteria that may lead to sickness. Be sure to monitor any changes in your skin tags or moles; if you notice any suspicious changes, contact your doctor right away.