Causes
Lymphedema is classified by why the lymphatic system fails:- Cancer treatment: The most common cause in the United States. Surgical removal of lymph nodes or radiation therapy — for breast cancer, melanoma, pelvic cancers, or lymphoma — can interrupt lymph drainage, sometimes years after treatment.
- Infection or injury: Severe skin infections, burns, or trauma can scar lymphatic channels.
- Chronic venous disease: Long-standing vein problems overload the lymphatic system; over years, venous swelling can evolve into a combined form called phlebolymphedema.
- Obesity: Significant excess weight can compress and impair lymphatic drainage.
- Parasitic infection: Worldwide the leading cause is filariasis, a mosquito-borne parasitic infection that damages lymphatic vessels. It is not acquired in the United States but is occasionally seen in people who have lived in affected regions.
- Primary lymphedema: A rare, inherited underdevelopment of the lymphatic vessels that can appear at birth, in adolescence, or in adulthood.
Symptoms
Lymphedema usually begins subtly and advances through stages:- Early signs: A feeling of heaviness, tightness, or fullness in the limb; rings, watches, shoes, or sleeves fitting more snugly than before.
- Visible swelling: At first the swelling may soften overnight; later it persists around the clock.
- Skin changes: The skin gradually thickens and hardens, and in advanced stages may develop a dimpled, orange-peel texture.
- Reduced movement: A heavy, tight limb can limit reach, grip strength, or comfortable walking, and sleeves, socks, and jewelry may leave deep indentations.
- Recurring skin infections: Stagnant, protein-rich fluid is a fertile ground for bacteria, so even minor cuts can lead to spreading skin infection.
Diagnosis
Diagnosis is usually made from the history and examination, particularly in someone with prior cancer surgery or radiation. Your physician will first exclude other causes of limb swelling — most importantly a blood clot such as deep vein thrombosis, as well as heart, kidney, or liver disease — often with an ultrasound and blood tests. When the picture is unclear, a specialized imaging study called lymphoscintigraphy can map the lymphatic drainage. Additional patient information is available from Johns Hopkins Medicine.Treatment
There is no cure for lymphedema, but consistent treatment controls swelling and prevents complications:- Complete decongestive therapy: The gold standard — a certified lymphedema therapist combines manual lymphatic drainage (a specialized gentle massage) with multilayer compression bandaging to reduce limb volume.
- Compression garments: Properly fitted sleeves or stockings, worn daily, maintain the gains achieved in therapy.
- Exercise and elevation: Gentle, progressive exercise pumps lymph out of the limb; elevation helps early-stage swelling.
- Meticulous skin care: Daily moisturizing and prompt attention to cuts, scratches, and insect bites protect against infection. Skin breakdown in long-standing swelling can also lead to slow-healing sores similar to venous ulcers.
- Pneumatic compression pumps: A sleeve that inflates in sequence to move fluid out of the limb, used at home by selected patients alongside garments and hands-on therapy.
- Weight management: Because excess body weight impairs lymphatic drainage, gradual weight loss often reduces swelling and improves how well compression garments fit.