lumps in the side of your neck are most likely from strep throat or another infection. less often, cancers like lymphoma or leukemia can make the lymph nodes swell up. read more
Swollen lymph nodes. When there’s a problem, such as infection, injury, or cancer, the node or the group of lymph nodes in that area may swell or enlarge as they work to filter out the “bad” cells. This may be called lymphadenopathy (LIMF-ad-uh-NOP-uh-thee). read more