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A petechia (/ p ɪ ˈ t iː k i ə /; [1] pl.: petechiae) is a small red or purple spot (≤4 mm in ... and purpura (4 to 10mm in diameter). The term is typically ...
Purpura (/ ˈ p ɜːr p jʊər ə / [1]) is a condition of red or purple discolored spots on the skin that do not blanch on applying pressure. The spots are caused by bleeding underneath the skin secondary to platelet disorders, vascular disorders, coagulation disorders, or other causes. [ 2 ]
A non-blanching rash (NBR) is a skin rash that does not fade when pressed with, and viewed through, a glass. It is a characteristic of both purpuric and petechial rashes. [1] Individual purpura measure 3–10 mm (0.3–1 cm, 3 ⁄ 32-3 ⁄ 8 in), whereas petechiae measure less than 3 mm. [2]
6. Purple spots on your hands and feet. These could be a sign of a bacterial infection of the heart, Kroshinsky said. 7. A circular-shaped rash in an area where Lyme disease is endemic.
The onset of the illness is nonspecific with fever, rigors, vomiting, and headache. Soon a rash appears; first macular, not much different from the rose spots of typhoid, and rapidly becoming petechial and purpuric with a dusky gray color. Low blood pressure (hypotension) develops and rapidly leads to septic shock.
The illness resembles a severe influenza, with a moderate fever (38-40 °C, or 101-104 °F), sore throat, chills, myalgia, headache, vomiting, and a diffuse red rash (maculopapular, petechial, or purpuric), located mostly on the hands and feet. The incubation period for the bacteria generally lasts from three-ten days.
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