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1.The history suggest the possibilities enlarged
lymph nodes in the first place.
2.Lymph nodal enlargement can be seen after any infection / inflammation, can be localized or systemic.
3.In this case you need to get treated the source of the infection.
4.Other possibilities are parotid,sub mandibular, or in fact a bony lesion - which needs to examine.
5.
Ultrasound will give the information of the nature of the lump its source and extensions. I recommend to see your GP get examined and follow accordingly.
Good luck.
Hope i have answered your query,
any thing to ask ? do not hesitate to ask.
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888