All skin tissue contains collagen and elastin fibers. The collagen is a fibrous protein that gives skin its specific structure and strength. That same collagen forms a series of fat-storing compartments (septae) within the skin which, when functioning normally, provide structural support and insulation. However, further to several hormonal processes occurring after puberty, if those compartments become over-full and rigid, the septae can’t contain the excess fat anymore. The septae bend or break, and the fat bulges out towards the surface of the skin, developing non- esthetic lumps on the skin. Rapid weight loss and gain, poor hydration are also contributing factors, while genetics are probably the most significant factor of all.