Decomposing melanin, which also means removing spots. Like melasma, which is a very common pigmentation skin mucosal disease, for relatively mild melasma, topical ointments can be applied to treat it. Hydroquinone cream, vincristine ointment, tretinoin, azelaic acid ointment, and compound arbutin ointment have obvious depigmentation effect, after applying them externally, they can play a role in removing spots. Laser and fruit acid skin resurfacing can also be used to remove spots. However, if the local hyperpigmentation is more serious, you can consider applying oral medications for relief, such as oral vitamin C, vitamin E, and tranexamic acid, etc. The application of these medications is significantly different from the regular dosage, so you must be under the guidance of a doctor for treatment.