Purpura are small purple spots between 4 mm and 10 mm in diameter. They appear on the skin, but they may also occur inside the mouth and throat.
Purpura develop when tiny blood vessels leak, and they usually look like a cluster of tiny dots. They can be a sign of an underlying condition, like thrombocytopenia or low platelets, but can also result from congenital disorders, drug interactions, or vitamin deficiencies.

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