But sometimes bruises appear for no obvious reason ... This is likely due to men having about 20% thicker skin than women and because aging women lose significantly more collagen than aging ...

Because solar purpura usually happens with aging and sun exposure, the skin around the bruises might show signs of damage and weakening. If you have solar purpura, your skin may also look thin ...

and actinic purpura (easy bruising related to vascular wall fragility in the dermis) (Gilchrest, 1990). Chrono logic skin aging, in contrast, is characterized by laxity and fine wrinkling ...