Is a mole a sign of skin cancer or it can be a sign of other types of cancer?

Most often not! There are many different moles or lesions that present on the skin during a persons lifetime. The vast majority are benign and of no consequence except for maybe appearance concerns. However there are certain moles or skin lesions that need to be evaluated because of their characteristics. Color changes, inflammation, enlargement are all things that should be checked by a physician.