ProLife Skin Labs Reviews: People of all ages often have problems with their skin. Take skin tags, for example. Even though they aren't dangerous, many people don't like the way they stick out of the skin. Aside from how they look, skin tags can become cancerous if they are not treated. It's also important to know that skin tags can be a sign of a more serious health problem. You might want to see your doctor to have tests done and get a professional opinion.