Defect in tissue... Ehlers–danlos syndrome (also known as "cutis hyperelastica") is an inherited tissue disorder caused by a defect in the body's synthesis of collagen. Collagen in connective tissue provided strength. In the skin, muscles, ligaments, blood vessels and organs, collagen plays a significant role and with increased elasticity they may not work right, leading to increased bruising.
Elastic fibers. The condition is a disorder of elastic fibers and since they provide the support to blood vessels , if they are not normal, the poor quality framework leads to easy disturbed blood vessels and bruising.