How Long Does It Take for Lymph Nodes to Go Back to Normal?

When the cause of lymph node enlargement is infection, it can take up to a month for nodes to go back to normal, states WebMD. Someone can also have swollen lymph glands due to other medical conditions, such as cancer, tonsillitis and mononucleosis. For this reason, if lymph glands do not shrink in size in this time period, it is important to see a doctor for diagnosis, notes the University of Maryland Medical Center.