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nodes act as a barrier.
Lymph collected from any tissue have to pass through a lymph node before mixing back in blood.
Whenever there is a infection/inflammation in the catchment area of a lymph node, infected lymph will reach to lymph node and lymph node will becomes swollen as a reaction.
When your ear lobe will become normal, lymph node may gradually shrink to normal.
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Dr.Chandra Shekhar Sharma