Non-blanching rash
A non-blanching rash (NBR) is a skin rash that does not fade when pressed with, and viewed through, a glass.
| Non-blanching rash | |
|---|---|
| Both petechiae and purpura on the lower limb due to medication induced vasculitis | |
| Specialty | Dermatology, hematology |
It is a characteristic of both purpuric and petechial rashes. Individual purpura measure 3–10 mm (0.3–1 cm, 3⁄32-3⁄8 in), whereas petechiae measure less than 3 mm.
A non-blanching rash can be a symptom of bacterial meningitis, but this is not the exclusive cause.
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