There are 5 basic skin care types: oily, combination (normal), sensitive, dry and sun-damaged. Your skin type is determined by how much — or how little — oil your skin produces. Genes, diet, stress level, hormonal fluctuations, medication and even your skincare regimen all determine how much oil your skin produces and you may find your skin type changes frequently going from dry to oily to normal — all in the course of a matter of months. This is normal. …