lymph node enlargement especially from mono can persist. some lymph nodes harden over time and can last a long long time. with that said since i have no way of examining you running diagnostic tests or delving into your medical history i would suggest that you see your medical provider to be properly evaluated. there can be many other reasons for lymph node enlargements.
permanent swollen lymph nodes after mononucleosis. is something wrong? . about a year ago i had mono and my lymph nodes in my neck and groin swelled as is common but even now close to a year later they are still rock hard. i can't seem to find this problem anywhere online.