Most women's skin type falls into one of six categories: dry; somewhat dry; normal; somewhat oily; oily; or combination. Skin type, which is determined by the amount of oil secretion, is hereditary. Environmental influences can tend to exacerbate conditions, but the different areas in the skin that produce oil and the amounts of oil produced are based on genetics.
Some women classify themselves as having sensitive skin. Although skin is remarkably robust, overexposure to the elements or overuse of products can lead to skin allergies or sensitivities. To avoid this, try to minimize the number of products you use and try to find ones designated for sensitive skin whenever possible.