In general, many things can cause your skin to wrinkle. Wrinkles are part of the process of getting older. Skin cells divide more slowly as people grow older, and the centre layer of skin, called the dermal layer, starts to thin. The dermis is made up of a series of elastin and collagen fibres, which give the skin strength and flexibility. There are small depressions in the skin’s surface when this system breaks down over time. Also, as we get older, our skin cannot hold on to moisture, and is less efficient at releasing oil, and takes longer to heal. All of these things contribute to the formation of wrinkles.