My son has had constant ear infections for the last year and has been on antibiotics but ive noticed one swollen lymph on his neck is that related?

You are likely: Correct, given his multiple ear infections. Lymph nodes can be swollen for a myriad of reasons. It's best to have his pediatrician take a look if it persists for weeks, or he is ill. Lymph nodes can be enlarged from: cat scratch fever ear infections gingivitis Hodgkin’s disease leukemia metastasized cancer mouth sores non-Hodgkin’s lymphoma measles tonsillitis toxoplasmosis tuberculosis