Hyperpigmentation, if it is an inflammatory skin reaction, may recover naturally. If hyperpigmentation is caused by pigmentation, it usually cannot subside by itself. 1. Post-inflammatory hyperpigmentation: If the skin hyperpigmentation is related to inflammation, such as mechanical injury, allergy, skin infection, atopic dermatitis, and the hyperpigmentation left after treatment, it usually does not need to be treated. It is recommended to do a good job of facial care, with the passage of time, hyperpigmentation may be able to subside on its own. 2. Pigmentation: Skin pigmentation, in the case of patches, such as freckles, sun spots, chloasma, age spots, usually cannot subside by itself. The melanin can be destroyed by giving suitable medication, laser and freezing under doctor’s guidance if necessary. To summarize, there are more causes of skin pigmentation. If it does not subside on its own for a long time, it is recommended to go to the hospital. If necessary, treatment can be given to promote the fading of pigmentation.