Petechiae are superficial,pinhead-sized (less than 3 mm),round,hemorrhagic macules,bright red at first,then brownish or rust colored.They are most commonly seen in the dependent areas,are evanescent, occur in crops,regress over a period of days, and most often imply a disorder of platelets, usually thrombocytopenia.They may also be a sign of a blood vessel disease such as scurvy.⚫ Petechiae are superficial, pinhead-sized (less than 3 mm), round, hemorrhagic macules, bright red at first, then brownish or rust colored. They are most commonly seen in the dependent areas, are evanescent, occur in crops, regress over a period of days, and most often imply a disorder of platelets, usually thrombocytopenia. They may also be a sign of a blood vessel disease such as scurvy