Understanding Widespread Skin Rashes and Purpura: Potential Causes and CareA sudden, widespread rash on the lower extremities—characterized by dense red or purple spots—can be alarming. In medical terms, flat or slightly raised spots caused by bleeding under the skin are often classified as petechiae (small pinpoint spots) or purpura (larger patches). Unlike standard inflammatory rashes, purpura and petechiae typically do not blanch (fade temporarily) when light pressure is applied.
Potential Causes of Widespread Leg Rashes
A rash with this appearance can stem from various underlying medical factors, including:
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