Petechial Rash - Approach

The petechial rash is a non-blanching rash due to the extravasation of RBCs. It can result from problems with hemostasis or vessel wall. Remember that vasculopathy can either be inflammatory (vasculitis) or noninflammatory. We hope this helps you reason through the patient with a petechial rash. Relevant videos:    • Cryoglobulinemia   (cryoglobulinemia)    • Amyloidosis - 3 main types   (amyloidosis) Subscribe for similar content: https://bit.ly/3kgjhdB App with all our schemas available for purchase: https://clinicalproblemsolving.com/ip... Subscribe to Patreon where Rabih and Reza discuss unknown cases:   / cpsolvers   Visit our website for schemas: https://clinicalproblemsolving.com/ Image of petechial rash from James Heilman, MD, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons