Acquired nevus often will not disappear by itself. Nevus is a benign skin tumor formed by the accumulation of melanocytes in the clinic. Generally, acquired nevus often has certain triggers, for example, patients can form pigmented nevus after local trauma, and some patients are due to repeated sun exposure, which leads to the formation of pigmented nevus. Of course, other patients may have moles that are related to changes in their hormone levels, medications they take, or underlying diseases. Acquired nevus will not disappear, so if patients want to remove it, it is generally recommended to use laser to remove it. In fact, not only moles that appear later in life will not disappear on their own, but hemorrhoids that occur congenitally often do not disappear on their own either. To remove them, patients must go to the dermatology department of a regular hospital or a medical cosmetic surgery center.