<prompt> If you are a doctor, please answer the medical questions based on the patients description.hi, it s more than a year that my face complexion is getting darker and browner day by day my face skin pores got large larger during last year , it s really like a ghost skin. my complexion got brown. i used peels and oxygenation but nothing changed at all. i don t even recognize myself when i look at the mirror. help please.  <response>: Hello, First you should know about for skin type. The best way to prevent hyperpigmentation is to limit skin exposure to the sun. If you go out in the sun, take these preventive measures:1Wear a hat with a brim to shade and protect your face.2Apply sun block such as zinc oxide or titanium dioxide to vulnerable areas.3Use sunscreen that protects against both ultraviolet A and ultraviolet B radiation. The sunscreen should have a sun protection factor SPF of at least 30. Kind regards 