Lymphedema

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Lymphedema is swelling caused by a problem in the lymphatic system, which normally helps drain fluid from tissues and fights infection. When the lymphatic system can’t work well, fluid builds up and tissues swell.

Causes
- Primary lymphedema: present from birth or develops later due to congenital problems in the lymphatic system (some genetic conditions). It can affect one or more limbs.
- Secondary lymphedema: more common, usually caused by damage or removal of lymph nodes or vessels during cancer treatment (surgery or radiation). It can also come from infections, trauma, obesity, or certain diseases. In tropical areas, infections like filariasis can cause it.

What happens
- Fluid builds up in the skin and underlying tissues, often with a lot of protein in the fluid.
- Over time, the skin can change and the tissue may become fibrous. The affected skin is more prone to infections and ulcers.
- In rare cases, long-standing lymphedema can be linked to certain cancers.

Symptoms and impact
- The main sign is persistent swelling, usually in one limb but it can affect other areas.
- The affected limb might feel heavy or tight, and the skin can thicken or become discolored.
- Infections (like cellulitis or erysipelas) are a risk and can worsen swelling.
- Lymphedema can affect daily activities and body image, and may cause emotional distress.

How it’s diagnosed
- Diagnosis is mainly based on history and a physical exam, with measurements showing differences between limbs.
- Imaging tests (like lymphoscintigraphy or indocyanine green lymphography) are used when surgery is being considered or to clarify the diagnosis.
- Some newer tests measure fluid directly in the limb and can help with early detection.

Treatment and management
- There is no cure, but symptoms can be managed to reduce swelling and improve quality of life.
- The cornerstone is complete decongestive therapy, which includes:
- Compression: wearing tight stockings or sleeves and/or bandaging to help move fluid out of the limb.
- Skin care: keeping the skin clean and protected to prevent infections.
- Exercise: regular activity helps improve lymph flow; compression is usually worn during exercise.
- Manual lymph drainage (MLD): gentle massage techniques to encourage lymph flow.
- Diuretics (water pills) are not helpful for lymphedema.
- Additional measures may include:
- Intermittent pneumatic compression pumps in some cases, used with other therapies.
- Long-term compression garments after decongestive therapy to maintain improvements.
- Bandaging to provide gentle, sustained pressure in the initial phase.
- Physical therapy and resistance training, which can be safe and beneficial when done with proper guidance and compression.
- Surgery is considered only for certain people after conservative treatments have not worked. Options include:
- Procedures that move lymph into the venous system or transfer lymph nodes.
- Suction-assisted lipectomy (liposuction) in some chronic cases with heavy fat and fluid buildup.
- Other therapies studied include low-level laser therapy (FDA-cleared in 2006) with some evidence of benefit in some people, and experimental drugs like QBX258 that show potential but need more study.

Prevention and daily care
- Keep skin clean and dry, check for cuts or infections and treat promptly.
- Maintain a healthy weight and stay active.
- Wear compression as advised, especially during activities and travel.
- Be aware of signs of infection (redness, warmth, fever) and seek medical care quickly.

Who gets it
- Lymphedema affects about 200 million people worldwide.
- It can affect any part of the body, most commonly the arms or legs.
- Risk is higher with age, obesity, and certain illnesses or treatments, especially cancer therapies involving lymph nodes or radiation.

If you have swelling that doesn’t improve with rest or compression, or you notice skin changes or redness, talk to a healthcare provider for an evaluation and management plan.