what causes moles to suddenly appear on face

Moles are common skin growths that develop due to an overgrowth of pigment-producing cells called melanocytes. While most moles are harmless, sudden changes to the color, shape, and size of moles can indicate serious skin conditions. The exact cause of moles is not well understood, but it is thought to be an interaction of genetic factors and sun damage in most cases. Moles tend to appear around times when hormone levels change, and people with light skin tend to have more moles. There are different types of moles, including congenital moles that are present at birth, acquired moles that appear after birth, and atypical moles that can have some of the same characteristics as melanoma. The sudden appearance of a new mole can be caused by a duplication of pigment-producing cells in the skin. While most moles are benign, new moles that emerge in adulthood are more likely to become cancerous than ones you’ve had for life. The causes of new moles in adults include hormonal changes, sun exposure, and genetic factors. It is important to monitor any changes in moles and to have regular skin checks by a dermatologist to detect any potential skin cancer.