4th June 2025

Epidemiology

Occasional petechiae (1-2) have been found in over 25% of well children, and are not considered concerning (unless associated with other clinical signs and symptoms).
Petechiae and purpura are more commonly seen in young children and older adults.
Ecchymoses are more common in:
- Older adults, due to thin skin and delicate blood vessel walls.
- Young children due to bumps and falls (note – bruises on the buttocks, chest and abdomen are considered abnormal and may indicate abuse).
- People who take part in contact sports.
Livedo reticularis:
- A temporary form (termed ‘cutis marmorata’) is found in up to 50% of healthy young children and frequently seen in young women; it is a physiological response to the cold and not harmful.

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