Medicine
Cutaneous Manifestations of Systemic Vasculitides
Quick fact
Palpable purpura—small raised purple spots that don't blanch—is the hallmark of cutaneous small-vessel vasculitis, and its presence can be a red flag for systemic vasculitis that may involve the kidneys, lungs, or nervous system.
Why this is interesting
You might have seen a rash that looks like tiny bruises, but did you know that such skin changes can be the first clue to a serious disease affecting blood vessels throughout your body? What do these rashes really tell us?