I agree with Dr Lowe. I am currently working in Head and Neck surgery and we see cases like your own very often. Lymph nodes contain white blood cells which are your body's weapon against infection and other harmful diseases. These lymph nodes number in their thousands in the body. They are located in strategic areas to drain certain organs or structures. If these are infected or inflamed for any reason, then those regional lymph nodes will enlarge. They may persist in this state for a significant period of time. In your case, it sounds like you have had either a middle ear infection or an infection of the ear canal. Therefore, the swelling may be entirely innocent and expected. However, if it has persisted for a concerning period of time, I suggest you first consult your family doctor to examine it and then he may suggest an ultrasound scan to ensure it is nothing sinister. I think this is unlikely and you should not have anything to worry about, but it is better to be cautious.
Dr Tino Solomon
Senior House Offcier in Surgery