A long mole at the root of the penis can be observed first, or it can be surgically removed or laser removed, which needs to be judged by the doctor in a comprehensive and specific case.
Moles, also known as pigmented nevi, are benign proliferations of melanocytes. They are common in almost everyone, and the older you get, the more moles you usually have. Most moles do not require further treatment. When malignancy is suspected, or when it affects your appearance or psychology, you can seek the help of a dermatologist.
If the mole at the base of the penis has been there since childhood, without any discomfort, and its size has not changed for a long time, you can continue to observe it and pay more attention to hygiene. If the mole grows later in life and the range keeps getting bigger, or if you feel that it affects your aesthetics and you feel less comfortable, you can remove it by surgical excision or laser cauterization.