What Causes a Swollen Lymph Node in the Neck on One Side Only?
1. Introduction A swollen lymph node in the neck on one side only is most frequently caused by a localized bacterial or viral infection in the adjacent throat, ear, or dental structures. The lymphatic system actively traps and destroys pathogens in the region, leading to acute, unilateral enlargement. While typically a benign immune response, persistent, … Read more