Bruises, also called contusions, appear as red, brown, bluish-purple ... This is likely due to men having about 20% thicker skin than women and because aging women lose significantly more collagen ...

and red or purple in color before gradually fading over a few weeks. Because solar purpura usually happens with aging and sun exposure, the skin around the bruises might show signs of damage and ...

While not common, bug bites can occasionally cause bruising ... can cause skin necrosis or death to skin tissue. This can cause skin discoloration ranging from red and purple to gray or black.