### Human:\npermanent 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.\n\n### Assistant: 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.