Laser spot removal is one of the more commonly used treatments in medical aesthetics, which can effectively lighten skin discoloration. But improper operation or improper care may also appear some harm. Laser spot removal is through the specific wavelength light beam emitted by laser instrument, which selectively acts on the lesion area, and promotes skin metabolism through gasification of local skin or crushing of pigment particles, so as to achieve the therapeutic effect on the lesion. Standardized operation and post-treatment scientific care generally do not have adverse reactions. If the mode of treatment is not properly selected or the energy is too high, thermal burns may appear on the skin, and redness, swelling, blisters and other localized conditions appear in the treatment area; if the depth of thermal damage is deeper, scarring, pigmentation or pigment loss may remain after healing. If the laser treatment is not properly cared for, such as wound water, sun exposure or mechanical abrasion, etc., it will lead to local infection, inflammatory hyperpigmentation and so on. It is recommended that patients who wish to undergo laser treatment should go to regular medical institutions, follow the advice of specialists to standardize the treatment, and take care of themselves scientifically after the treatment, so as to avoid adverse consequences.