It would be more helpful if you can inform us more about the characters of this swelling like its exact site: is it a diffuse swelling on the right side of the neck or more localized (lump) and if localized what about its size, is it painful, tender, etc.
Following ear, throat, tonsil, gum or dental infection, draining lymph nodes especially those in the upper side of the neck become enlarged, painful and tender.
After treatment of infection with adequate course of antibiotics, they should regress in size but some may never return to normal size. Hence nodes that continue to grow in size are significant and those that regress in size tend to be more reassuring.
I advise you to follow up with your doctor.
Keep us updated.
This answer does not substitute for direct medical consultation.
Dr. Safaa Mahmoud.
MB BCh, MSc Internal Medicine. MD Medical Oncology.
PhD Experimental Medicine and Biochemical Science.