If NOT, try one of these:
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There is a pimple where a stitch comes through the skin. The pimple suggests a low-grade infection.
The photo shows an abrasion of elbow that has become infected with bacteria.
If you look closely at this photo, you should be able to see a red streak (lymphangitis) spreading from the hand wound up into the arm.
The presence of lymphangitis means that there is an infection that needs urgent antibiotic treatment. Admission to the hospital is sometimes required.