Lymphedema

What it is

The lymphatic system drains fluid from tissue back into the circulation. When nodes are removed or damaged by radiotherapy, that drainage capacity is reduced and fluid accumulates in the limb, producing swelling, heaviness and, over time, tissue changes.

For decades people were told to avoid lifting with the affected arm, sometimes for life. Randomised trials have since shown that progressive resistance training is safe and does not increase lymphoedema - and may reduce flare-ups. Muscle contraction actively pumps lymph, so the advice was not only unnecessary but counterproductive.

What it feels like

• Swelling in the arm or leg, sometimes including the hand or foot
• A feeling of heaviness, tightness or fullness in the limb
• Clothing, rings or watches becoming tight on that side
• Reduced range and a sense of the limb being cumbersome
• Skin becoming firmer and thicker over months and years

What causes it

Most people have more than one of these at once, and they feed each other. Read the list looking for the two or three that sound like your week rather than for the one true answer — the ones that describe you are the ones worth acting on.

Lymph node removal

Surgery removing lymph nodes, most often in the armpit for breast cancer or the groin for melanoma and gynaecological cancers, reduces the drainage pathways available.

Radiotherapy

Radiation causes fibrosis around remaining lymphatic vessels and nodes, further reducing capacity. The combination of surgery and radiotherapy carries the highest risk.

Reduced muscle pump activity

Muscle contraction squeezes lymphatic vessels and is a major driver of lymph flow. An inactive limb drains less well, which is precisely why the old advice to avoid using it was harmful.

Number of nodes removed

Risk rises with the number removed. Sentinel node biopsy carries substantially lower risk than full axillary clearance, which is one reason surgical practice changed.

Obesity

One of the strongest modifiable risk factors, both for developing lymphoedema and for its severity. Weight loss improves it.

Infection

Cellulitis in the affected limb damages lymphatics further and worsens the swelling, and lymphoedema in turn raises the risk of infection - a loop worth interrupting with prompt treatment.

Air travel and pressure changes

Frequently blamed, though the evidence is weaker than the advice suggests. Compression during flights is a reasonable precaution rather than an established necessity.

Delayed onset

Lymphoedema can appear months or years after treatment, which means the risk period is long and awareness needs to be too.

Progressive tissue change

Long-standing swelling produces fibrosis and fat deposition in the limb, which is less responsive to compression than the fluid stage. Early treatment matters for this reason.

The old advice to avoid lifting

Given for decades and now contradicted by randomised trials. It cost people strength, function and confidence for no benefit.

Who tends to get it

• Anyone who has had lymph nodes removed or irradiated
• People who had axillary clearance rather than sentinel node biopsy
• Anyone who had both surgery and radiotherapy to the same area
• People with obesity, which is the strongest modifiable factor
• Anyone who has had cellulitis in the affected limb

What makes it worse, and what settles it

The qFIT routine for this

Ready-made routineCirculation & Swollen Legs

qFIT already has this one built. It runs massage first, then stretching, then strength — the order that works on a body that is already sore — and every activity in it carries the reason it is there.

The button below opens your Checklist with this routine already selected, so instead of your whole list you land on just its Categories, Targets and Exercises, each with its checkbox, ready to tick as you work through them.

Have more than one problem? Tick yours under My Problems on My Profile and your Checklist's Routine list gains Recommended for my problems — every routine for the problems you picked, merged into one. Your picks stay private; that filter is the only thing they feed.

Get it checked if…

Sudden increase in swelling with redness, warmth or fever suggests cellulitis - urgent antibiotics, stop massage

And whatever the body part: chest pain or unusual breathlessness on exertion; a fever alongside the pain; unexplained weight loss; pain that is constant and unrelated to how you move; new numbness, weakness or loss of bladder or bowel control; or one calf that is swollen, warm and painful. Any of those, stop and get assessed.

How it usually goes

Lymphoedema is usually a long-term condition that is managed rather than cured, and early treatment before tissue changes set in produces much better results. Progressive resistance training is safe, improves strength and function, and does not worsen the swelling - which reverses decades of advice. Any redness, heat, spreading or fever in the affected limb is cellulitis and needs prompt antibiotics rather than waiting.

Prevalence basis: Oncology outcome studies

Others the same routine covers

These share the Circulation & Swollen Legs routine, so the work is the same. If one of them also sounds like you, that is a reason to expect more from it, not less.

This is general information, not a diagnosis, and it cannot examine you. If it matches you, use it to ask better questions of a clinician rather than to replace one.