The black spots left by oil splashes on face belong to contact pigmentation left after the stimulation of burns. Pigmentation is the pigment aggregation formed by epidermal cells in their own compensatory recovery process after recovering from trauma, which can be ignored and will gradually fade away in about 2-3 years and then return to normal condition. If you want the dark spots to recover quickly, you can choose to use oral medication with topical medication, oral glutathione with vitamin C and vitamin B, and apply hydroquinone cream or vitamin E ointment on the surface of local dark spots, hydroquinone cream can make the number of pigment cells decrease to achieve the whitening effect. Vitamin E ointment can play the role of antioxidant, has the effect of skin whitening, can increase the elasticity of the skin to restore the texture of the skin, need to pay attention to not repeatedly stimulate the dark spots to prevent the color from gradually deepening to affect the treatment effect.