Once diagnosed, however, many patients fail to receive treatment with the level of attention they deserve and skin cancer is one of the more common cancers in the United States, and many patients tend to forget about skin cancer detection. People do not like going or waiting to receive medical help for different reasons, whether because they are not aware of the situation only the fact, scared of going, or pure denial. However, skin cancer left untreated can become serious and even spread and cause irreversible damage. Understanding what occurs when skin cancer is left untreated is essential in taking proactive steps for both prevention and treatment.