hi there, a lymph node swelling in any region signifies that there is some infection or obstruction inthe draingae of lymph due to any cause. As the lymph node of the cervical region is enlarged in your case, it could either be due to the wisdom tooth infection
or inflammation, ear nose or throat infection
,or any scalp inflammation
or infection to name a few. That region can also see an enlarged lump due to parotid gland
or and other submandibular gland
. Tuberculous lymph adnenitis is also not an uncommon finding in that region., To actually ascess whether the enlargement is a lymph node or a gland or any other cause, one needs to get a Fine Neeedle Aspiration cytology or FNAC done which gives a fairly accurate result as to the cause and that could be treated accordingly. Get an FNAC done and it will put your mind to peace. Take care.