: petechiae) is a small red or purple spot (≤4 mm in diameter) that can appear on the skin, conjunctiva, retina, and mucous membranes which is caused by haemorrhage of capillaries.

Excessive scratching and friction, especially on thin and poorly circulated parts of the body may also cause petechiae.

Such instances are generally considered harmless and usually disappear within a few days, but depending on severity and frequency may be indicative of an underlying medical condition.

[10] However, the presence of petechiae may be used by police investigators in determining whether strangulation has been part of an attack.

The documentation of the presence of petechiae on a victim can help police investigators prove the case.