Many beauty seekers want to have a clean, beautiful face, but what about the slow spots on the face? As we age, many women have some pigmentation spots on their faces, which seriously affects their personal image. We all know that pigmentation spots are hard to remove and will be more serious after sun exposure. So how do pigmentation spots form? Pigmentation can be caused by internal factors or external factors. The causes of pigmentation spots are different for different people, and the types of spots are also different. External factors: Long-term exposure to sunlight, excessive exposure of skin to ultraviolet rays. Epidermal irritation and acne are the causes of pigmentation spots formation. Personal factors: 1. Bad habits: lack of sleep, partial eating, picky eating, stressful, these bad habits will make the skin metabolism slow, and pigment spots will easily appear on the face. 2.Endocrine disorders: Menstrual disorders, abnormal secretion of sex hormones and emotional instability make pigment spots appear easily on the face. Pigmentation spots are mostly produced during menstruation, and can also be produced during pregnancy. 3.Autosomal inheritance: Most females have spots on the face from the age of 5, with more spots and darker color in spring and summer, and less spots and lighter color in autumn and winter. The spots are mostly light brown or yellowish brown.