Entire body Enlargement  Extend marks are actually skin scars that produce because of a immediate development or growth in the system. The scarring commences within the center layer in the skin that's known as the dermis. As the system expands, the tissues under the skin can also be stretched and once they may have arrived at their limit, they now begin to tear and begin to show within the surface area. The collagen production can be interrupted hence the tissues are not able to recover.