including the neck on either side of the front, sides, and back, behind your ears, on the back of your head, or under your jaw and chin. Swollen lymph nodes are also called lymphadenopathy.
A swollen lymph node can be a bit like your body’s version of a red flag: When one of these bean-shaped clusters of immune cells in your neck ... your lymph nodes are well-equipped to fight ...
A viral infection, like a cold or the flu, can cause lymph nodes on one side of your neck to swell ... it can trigger swollen lymph nodes and postnasal drip that can cause soreness on one side ...