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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.
In some cases, excessive ear wax can accumulate in the ear canal and cause symptoms including: 1  Ear pain. 2  A feeling of fullness in the ear. 3  A plugged sensation in the ear. 4  Hearing loss. 5  Tinnitis (ringing in the ears) 6  Ear infection. 7  Itching. 8  Ear odor. 9  Discharge coming out of the ear. 10  Coughing.