The principle of laser is to directly destroy the target melanin, and the effect is obvious. Generally, it is done at one time (regular hospitals and street shops can't guarantee it), and the surrounding area will generally not be longer; Dot mole, an acidic drug, is burned wherever it is ordered, which will inevitably damage the healthy skin around the nevus, and usually only the melanin in the epidermis is ordered, and the "nevus source" hidden in the dermis is still there, so the same part may be removed many times. If this position is clicked, the surrounding skin will grow back. Whether or not to leave marks depends on the depth of skin and moles, such as scar constitution or deep moles, so the chances of leaving marks are much greater. Personally, I suggest going to the plastic surgery department of a regular hospital or a beauty hospital with a good reputation (not counting loud advertisements). Professional doctors are experienced and at least know how much anesthetic to use, how big the area is and how deep the point is. Those so-called chain stores on the street are not even qualified to play anesthetic. Take a cotton swab and wipe it with unknown expired alcohol, then start using laser or medicine. Not to mention technology.