Yes, some moles can become cancerous. The majority of moles are benign and do not develop into cancer. However, a small percentage of moles can develop into melanoma, which is a type of skin cancer that can be serious and potentially life-threatening if left untreated.   It is important to have any moles that exhibit changes in size, shape, color or texture examined by a dermatologist. Additionally, individuals with a family history of skin cancer or a personal history of previous skin, cancers are at a higher risk of developing melanoma and should have their moles regularly checked by a dermatologist.   Wearing protective clothing, applying sunscreen with at least SPF 30, seeking shade during peak sun hours, and avoiding tanning beds can reduce the risk of developing skin cancer. If you have concerns about a mole or other skin growth, it is important to consult with Beverly Hills board-certified plastic surgeon, Dr. Rosenberg, for proper evaluation and treatment.