Doctors often recommend that people who are at risk for skin cancer examine their skin regularly or have a health care provider do so. Such exams have not been shown to decrease the risk of dying from skin cancer, and they may lead to overtreatment. However, people should be aware of changes in their skin, such as a new mole or a change to an existing mole, and report these to their doctor promptly. Screenings should begin around the ages of 20s or 30s, but anyone with high risk of developing skin cancer, due to hereditary or sun exposure (etc.) should be screened sooner to confirm no cancer has developed.