Most of us would rather have firm, tight skin like we did when we were younger. Nonetheless as we get older, our skin has a tendency to wrinkle and sag a bit. There are a number of reasons explaining why this happens, including sun damage, damage from smoking, not staying hydrated, and most of all, less collagen being formed in our skin as we age. There are a considerable number of different skin-tightening techniques available, from the mild to the aggressive, so you need to think fastidiously before making a decision on how you need to tighten up your skin.