This situation belongs to inflammatory pigmentation, and there is no good way. If you try some traumatic methods rashly, it may get worse. It usually takes several years until it fades naturally. Introduction of L- vitamin C may have some effect.

Dr. Wu Sufan solemnly reminded me that I couldn't fully understand the illness because I couldn't see the patient face to face. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )

Zhejiang Provincial People's Hospital Wu Sufan/