What are the reasons for the swelling of both testicles in a one-year-old infant accompanied by fever?

Patient's question:

Sure, here is the translation of the content you provided:
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No
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Doctor's answer:

This issue. It's best to see if the symptoms can be relieved when the baby is lying flat. I think I heard from others that if it's also like this when lying flat, the possibility of epididymitis or a cyst is relatively high.