Can moles grow larger?
Apr 23, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
Moles generally do not grow larger, but they may increase in size if continuously irritated. Moles are benign proliferations of melanocytes; the exact pathogenesis is not fully understood, but it may be related to genetic mutations. During embryonic development, melanocytes may remain abnormally in the dermal layer for prolonged periods, leading to this atypical proliferation. Once formed, moles typically do not regress spontaneously.
Moles generally do not grow larger, but they may increase in size if continuously subjected to irritation. The details are as follows:
1. No growth
Moles are benign proliferations of melanocytes. The exact pathogenesis is not fully understood but may be related to genetic mutations. During embryonic development, melanocytes remain abnormally in the dermal layer for an extended period, leading to the formation of moles. Once formed, moles typically do not disappear spontaneously and gradually stabilize with age without further changes. Therefore, moles usually do not grow.
2. Possible growth
If a mole is exposed to prolonged external stimuli—such as sunlight or friction from clothing—it may enlarge. Patients should monitor any changes in the mole's color. If the mole becomes darker, develops irregular borders, or appears spiky or ill-defined, prompt medical evaluation is necessary to rule out malignant transformation. Malignant melanoma can spread via the lymphatic system to nearby lymph nodes and tissues, or through the bloodstream to distant organs, resulting in new tumor formations throughout the body and carrying a poor prognosis.
If the mole does not affect appearance, special treatment is usually unnecessary. However, if it is cosmetically undesirable, laser therapy at a hospital can be considered. Daily sun protection is important: apply sunscreen before going outdoors and wear protective items such as hats and masks.
