Hi Cathi, lymphadema is lymphatic obstruction - a condition of localized fluid retention and tissue swelling. In context of cancer, it seen after lymph node dissection, surgery and/or radiation therapy, in which damage to the lymphatic system is caused during the treatment. In case you are facing any symptoms like painful or severe facial swelling or difficulty in breathing, you need to get in touch with your physician. Probably he'll refer you to certified lymphedema therapist depending on your case.