Our skin is at the mercy of many forces as we age: sun, harsh weather and our own bad habits. How your skin ages will depend on a variety of factors such as your lifestyle, diet, heredity and other personal habits. Other factors contributing to wrinkled, spotted skin include normal ageing, loss of subcutaneous support (fatty tissue between your skin and muscle), stress, daily facial movement and obesity. Here's how your skin ages what your skin needs at each age...