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After knee arthritis, a protruding line was found behind the popliteal fossa

Dec 24 20214 people replied
Description Of Condition:

After the onset of knee arthritis, it was swollen for a day or two. Later, it was found that there was a protruding line behind the popliteal fossa. I don't know when to have it. It's not painful or itchy. Light red.

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