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In addition, it is also possible for swollen or enlarged salivary glands to also form a lump in the area you are describing behind the ear. This can sometimes occur if part of the duct draining the salivary gland into the mouth becomes clogged.
Causes of Swollen Lymph Nodes. 1  An infection on the Pinna of the ear due to ear piercing can be a cause of swollen lymph node in front of the ear. 2  Sometimes, the salivary glands present in front of the ear get swollen.3  This happens when the duct or the tube that carries the saliva from the glands get blocked.auses of Swollen Lymph Nodes. 1  An infection on the Pinna of the ear due to ear piercing can be a cause of swollen lymph node in front of the ear. 2  Sometimes, the salivary glands present in front of the ear get swollen.