Picosecond laser spot removal is a type of laser spot removal, which is a little less irritating to the skin compared to normal lasers, and patients can selectively get rid of pigment spots on their bodies with this method. Picosecond is a very short pulsed laser, which can emit high energy in a short period of time and has a very short action time, so it has a very strong impact on the pigment particles in the deeper layers of the skin surface, and can break the larger pigment particles into especially small pigment particles, which can then be absorbed or metabolized by the body system, thus achieving the purpose of removing spots. However, patients need to pay attention to the energy parameters, as the picosecond laser emits higher energy laser in a short period of time. If not handled properly, it may cause late pigmentation or lead to skin damage and scarring. In addition, some patients will experience skin edema, redness, dryness and other symptoms after spot removal. Patients can observe first at this time, which usually subsides naturally after a period of time, but if the symptoms persist or worsen, they need to go to dermatology department for consultation. After picosecond laser exposure, attention should be paid to sun protection, as external UV stimulation can easily cause hyperpigmentation. If hyperpigmentation occurs, it may last for more than 6 months on the face and about 1 year on the trunk or extremities, so patients should take better care from early on to prevent hyperpigmentation.