Why are the lymph nodes on one side of my neck swollen?

Swollen lymph nodes on one side of your neck can indicate an infection or inflammation in that area, such as a throat infection, dental issue, or ear infection. They may also swell in response to other illnesses, including viral infections like the common cold or flu. If the swelling persists or is accompanied by other symptoms like fever or pain, it’s advisable to consult a healthcare professional for a proper diagnosis.