Lymphedema Summary Lymphedema is the name of a type of swelling. It happens when lymph builds up in your body’s soft tissues. Lymph is a fluid that contains white blood cells that defend against germs. It can build up when the lymph system is damaged or blocked. It usually happens in the arms or legs. Causes of lymphedema include Infection Cancer Scar tissue from radiation therapy or surgical removal of lymph nodes Inherited conditions in which lymph nodes or vessels are absent or abnormal Treatment can help control symptoms. It includes exercise, compression devices, skin care, and massage. NIH: National Cancer Institute National Cancer Institute Clinical Trials ClinicalTrials.gov: Lymphedema National Institutes of Health Array Compression stockings Lymphatic obstruction Lymphedema Genetics Genetics Home Reference: Hennekam syndrome National Library of Medicine Genetics Home Reference: lymphedema-distichiasis syndrome National Library of Medicine Genetics Home Reference: Meige disease National Library of Medicine Start Here Guide to Understanding Lymphedema Living Beyond Breast Cancer Lymphedema Vascular Disease Foundation Lymphedema Mayo Foundation for Medical Education and Research Lymphedema (PDQ) National Cancer Institute Related Issues Infection and Other Complications National Lymphedema Network Lymphatic Filariasis Centers for Disease Control and Prevention Tips for Travel and Aircraft Flight National Lymphedema Network Specifics Lymphedema as a Cancer Treatment Side Effect American Society of Clinical Oncology Understanding Lymphedema (For Cancers Other Than Breast Cancer) American Cancer Society Prevention and Risk Factors Lymphedema Risk Reduction Practices National Lymphedema Network Women Lymphedema: What Every Woman with Breast Cancer Should Know American Cancer Society Diagnosis and Tests Lymphoscintigraphy Array Find an Expert National Cancer Institute National Cancer Institute National Lymphedema Network National Lymphedema Network Journal Articles Lymphedema Treatments and Therapies Treatment of Lymphedema National Cancer Institute Reference Desk What Is the Lymphatic System? National Lymphedema Network