Flow does not necessarily mean effective drainage.

They sound like the same thing. They aren’t quite the same conversation.

If you spend any time on social media at the moment, you could be forgiven for thinking the lymphatic system has suddenly become terribly fashionable.

There are compression boots, rollers, machines, wooden sculpting tools, massage techniques and body-contouring treatments.

And somewhere amongst them you will very often see the words:

LYMPHATIC DRAINAGE.

Now, before anyone gets cross with me, this isn’t an article about one treatment being wonderful and another being dreadful.

Different treatments have different purposes.

But recently I found myself thinking about two words that we tend to use almost interchangeably:

First, a little lymphatic anatomy

Your lymphatic system helps collect excess fluid, proteins and other substances from the spaces between your cells and eventually returns fluid to the circulation.

But it isn’t simply a network of passive drainpipes.

Larger collecting lymphatic vessels contain valves and contractile sections that help propel lymph. Movement, muscle activity and changes in tissue pressure also contribute to lymph transport.

And lymphatic vessels are organised into drainage territories.

Research by Suami and colleagues has helped map these territories — lymphosomes — showing areas of skin whose lymphatic vessels connect with particular groups of regional lymph nodes. The anatomy is more organised, and also more individually variable, than the simple diagrams we tend to see in basic anatomy books. Read the paper.

So yes:

Movement matters. Walking matters. Muscles contracting matter. Changing position matters. External pressure can influence tissues and fluid.

But here comes our first rabbit hole.

🐇 Fi’s white rabbit hole No. 1

Moving something doesn’t necessarily tell us where it’s going

Imagine traffic.

Seeing lots of cars moving tells you there is traffic flow.

It doesn’t tell you whether they’re travelling towards London, Ipswich or completely in the wrong direction.

Lymphatic physiology is obviously rather more complicated than the A12, but you get my point.

And that becomes especially interesting when the usual lymphatic route has been altered.

What if the map has changed?

This is where specialist lymphatic work becomes particularly interesting.

An anatomy textbook gives us a map of normal lymphatic anatomy.

But humans haven’t read the textbook.

There is anatomical variation between people, and lymphatic anatomy and function can also be altered by things such as surgery, lymph-node removal, radiotherapy, trauma and lymphatic disease.

Suami’s anatomical work shows that superficial collecting vessels travel towards particular lymph-node basins and form distinct lymphatic territories. Connections between vessels exist, but the lymphatic network is not simply an unrestricted mesh through which fluid can be pushed anywhere we fancy. Read the paper.

So imagine somebody who has undergone cancer surgery involving lymph nodes.

The route that previously handled lymph from a particular territory may now be altered.

What happens then?

The body may find alternatives.

And down the rabbit hole we go again.

🐇 Fi’s white rabbit hole No. 2

Anastomoses, connections and diversions

Anastomosis sounds horribly complicated.

The basic concept isn’t.

Lymphatic vessels and territories can have connections, and when normal transport is disrupted, alternative or collateral drainage pathways may become important.

But — and this is crucial — knowing that alternative routes can exist doesn’t mean that a therapist can simply assume which route an individual person’s lymph is using.

Modern imaging has made this extraordinarily interesting.

A small study examining women with breast lymphoedema after breast-cancer treatment used indocyanine green (ICG) lymphography to look at actual drainage patterns.

All ten women with breast lymphoedema showed altered lymphatic morphology, and nine of the ten showed collateral drainage. Alternative drainage was seen towards parasternal, contralateral axillary, intercostal and clavicular regions.

Then there is dermal backflow

This one has particularly grabbed me recently after attending a lymphoedema conference.

Because dermal backflow demonstrates beautifully why movement and effective drainage cannot simply be treated as synonyms.

Healthy collecting lymphatics have valves and contractile activity that normally help transport lymph in one direction.

When downstream transport is impaired, lymph can move backwards towards the initial lymphatics within the skin.

That is dermal backflow.

ICG lymphography allows superficial lymphatic function to be observed and can show normal linear vessels alongside abnormal dermal-backflow patterns. Research describes a progression commonly characterised as splash, stardust and diffuse patterns. More extensive dermal backflow generally accompanies greater disruption of lymphatic transport. Read the review.

Think about that for a moment.

The lymph is moving.

But we wouldn’t therefore say:

“Excellent. Movement achieved. Job done.”

It is moving abnormally.

And THAT is perhaps the clearest demonstration of why “get the lymph moving” isn’t the whole story.

🐇 Fi’s white rabbit hole No. 3

Movement isn’t automatically effective drainage

Dermal backflow may involve retrograde filling of superficial dermal lymphatics when downstream transport is impaired.

And imaging matters here.

My hands are not an ICG scanner.

I cannot put my fingers on somebody and announce exactly which collector is working, where dermal backflow is occurring or precisely which collateral pathway their body has established.

That’s an important limitation to acknowledge.

What specialist training gives me is something different:

The knowledge to understand why those things matter.

So what about those firm wooden sculpting treatments?

You may have seen them.

Wooden rollers, cups and sculpted tools are used quite firmly over the abdomen, thighs, bottom or other areas, often as part of body-contouring treatments.

You’ll see names such as wood therapy or maderotherapy, and sometimes these treatments are marketed using terms such as lymphatic drainage.

This is where I think language matters.

I’m not saying these treatments are inherently right or wrong.

Someone having a cosmetic body treatment with an otherwise healthy lymphatic system is not automatically comparable with somebody receiving specialist treatment for lymphoedema or an altered lymphatic system.

And we shouldn’t pretend that every intervention involving pressure or tissue movement is doing the same thing.

What about machine-based lymphatic treatments?

You may have seen inflatable compressiom boots or sleeves offered as “lymphatic drainage” in salons. The inflatable garments apply pressure in a sequence, and some people may find a session pleasant or helpful. I don’t think the useful question is whether a machine is “better” or “worse” than hands. It’s what the treatment is being offered for, and whether it is suitable for the person booking it.

If somebody comes in because their legs feel persistently heavy or swollen, I would hope the conversation begins before they get into the suit. When did it start? Is it one leg or both? Is it changing? Is there a relevant medical history? Knowing how to use the machine and check its stated precautions is important, but it doesn’t by itself equip someone to work out why a leg is swollen.

A salon practitioner doesn’t have to diagnose the cause; they do need to recognise when it is outside their knowledge and recommend appropriate medical assessment rather than simply selling a course of treatments. That is fairer to the client — and, to me, it is what responsible practice looks like.

Supporting normal lymphatic flow is not the same as treating lymphatic dysfunction

And I think this may be the most important distinction in the entire article.

Someone with a normally functioning lymphatic system may support normal physiology through everyday things such as movement and muscle activity.

That is very different from treating somebody with:

• established lymphoedema
• previous lymph-node surgery
• altered lymphatic pathways
• significant postoperative oedema
• fibrosis
• radiotherapy-related tissue change
• suspected dermal backflow
• unexplained swelling.

The question has changed from:

“What can help things move?”

to:

“Why isn’t this system transporting fluid normally?”

And that requires assessment.

This is where training matters

A well-trained lymphatic therapist isn’t simply learning a series of strokes.

They need to understand anatomy, physiology, lymphatic territories, pathways, contraindications, the person’s medical history and the reasons swelling might be present.

With somebody who has had cancer treatment, for example, I’m interested in:

What surgery have they had?

Were lymph nodes removed? Which ones?

Was there radiotherapy?

Where is the swelling? When did it begin?

What does the tissue look and feel like?

Is it pitting? Is there fibrosis? Are there scars?

Are there signs that require medical assessment?

What would normally drain this territory?

And might that pathway have changed?

That’s clinical reasoning.

🐇 Fi’s white rabbit hole No. 4

Hands + brain

There is another reason I value hands-on treatment.

Hands give me feedback.

I can alter pressure. Change direction. Notice changes in tissue texture. Feel pitting. Notice fibrosis. Work differently around scars. Stop. Reassess.

And respond to the human being underneath my hands.

And does Manual Lymphatic Drainage actually work?

Now we get to another thing I feel strongly about.

Being trained in a treatment doesn’t mean I have to pretend it is the answer to everything.

The evidence for Manual Lymphatic Drainage (MLD) is mixed and highly dependent on the condition, outcome and other treatment being provided.

A systematic review of 17 studies in people at risk of or living with lymphoedema found some studies reporting benefits in volume, quality of life or symptoms, while others found no additional benefit when MLD was added to complex lymphoedema treatment. The studies identified were overwhelmingly concerned with breast-cancer-related lymphoedema, limiting how widely we can generalise the results. View the review.

A 2022 meta-analysis of 11 randomised trials in breast-cancer-related lymphoedema found an improvement in pain but not a statistically significant improvement in lymphoedema volume or quality of life. View the meta-analysis.

Other systematic reviews have likewise concluded that evidence for preventing or reducing breast-cancer-related lymphoedema remains uncertain.

And we now have another fascinating example.

A 2026 systematic review of eight randomised trials involving 463 people after total knee replacement found that routine MLD did not consistently improve postoperative oedema, pain or range of movement. The authors concluded that current evidence does not support routine MLD as the primary treatment after knee replacement, although it may have a selective role within wider rehabilitation. Read the review.

I actually love research like this.

Because evidence-informed practice shouldn’t be about collecting papers that prove our favourite treatment works.

It should change the question.

Instead of:

“You’re swollen. Shall I do MLD?”

we ask:

“Why are you swollen — and what does this particular person need?”

That is a much more interesting conversation.

Three little differences that suddenly become rather important

If you’ve followed me this far down the rabbit hole, these are the three ideas I’d like you to take away.

FLOW ≠ EFFECTIVE DRAINAGE

Something moving doesn’t automatically tell us whether transport is effective or where it is going.

DERMAL BACKFLOW ≠ COLLATERAL DRAINAGE

Dermal backflow reflects abnormal superficial patterns associated with impaired lymphatic transport. Collateral drainage refers to alternative pathways that may help transport lymph when usual routes are compromised. ICG studies can demonstrate both phenomena. Read the review.

SUPPORTING NORMAL FLOW ≠ TREATING LYMPHATIC DYSFUNCTION

Helping a healthy body move is one conversation.

Treating a lymphatic system altered by surgery, radiotherapy, disease or established lymphoedema is another.

So perhaps we’ve been asking the wrong question

I’m absolutely in favour of getting people moving.

Walk.

Breathe.

Use your muscles.

Change position.

Exercise appropriately.

Your lymphatic system isn’t something that needs constantly “detoxing” by somebody else.

But when we’re talking about swelling or a lymphatic system that may have been altered, I think we need to go further than:

“Let’s get your lymph moving.”

Because sometimes the more interesting question is:

“Where are we asking it to go?”

🟢🟠🔴 A little swelling traffic light

🟢 Mild, expected or transient swelling — movement, changing position and following the advice you’ve been given by your healthcare team may be appropriate.

🟠 Persistent, unexplained, increasing or recurrent swelling — particularly following cancer treatment, lymph-node surgery or radiotherapy — deserves proper assessment rather than simply choosing a treatment advertised as “lymphatic drainage.”

🔴 Sudden one-sided swelling, marked redness or heat, significant pain, breathlessness, chest pain or feeling acutely unwell needs prompt medical assessment rather than massage or MLD.

Want to follow me further down the rabbit hole? 🐇

Reading list

For people who would like the anatomy and research rather than simply taking my word for it:

• Suami H, Scaglioni MF. Anatomy of the Lymphatic System and the Lymphosome Concept with Reference to Lymphedema. Lymphatic territories, collectors and structural changes following lymph-node dissection. Read the full paper.
• A systematic review of ICG lymphography for primary lymphoedema. Retrograde flow, dermal backflow and splash, stardust and diffuse patterns. Read the review.
• Heydon-White A et al. Assessing breast lymphoedema following breast cancer treatment using indocyanine green lymphography. A small study visualising altered and collateral drainage pathways. View the study.
• Thompson B et al. Manual lymphatic drainage treatment for lymphedema: a systematic review. Mixed findings on the additional benefit of MLD. View the review.
• Li Y et al. Manual Lymphatic Drainage for Breast Cancer-related Lymphedema: systematic review and meta-analysis. Eleven randomised trials looking at pain, limb volume and quality of life. View the paper.
• Papi D et al. Effectiveness of Manual Lymphatic Drainage After Total Knee Arthroplasty: A Systematic Review.2026. Eight randomised trials and 463 participants. Read the full review.

• International Society of Lymphology. The Diagnosis and Treatment of Peripheral Lymphedema: 2023 Consensus Document.
  Discusses intermittent pneumatic compression as one possible part of lymphoedema management, including the need to observe for fluid moving further up the limb. Read the consensus document.

• Advertising Standards Authority. Health: Detoxing and lymphatic drainage.
  A useful reminder that claims made for “lymphatic drainage” treatments need appropriate evidence. That applies to how we talk about hands, tools and machines alike. Read the guidance.

• A note on wood-sculpting research: I haven’t found good clinical evidence showing that wooden body-contouring tools treat lymphoedema. That is a limit of the evidence, not a judgement about whether somebody might enjoy a cosmetic treatment.

One final thought from me

I didn’t write this because I think every person needs hands-on MLD, or because I’m against tools and machines. I wrote it because people with swelling deserve a better question than “Which lymphatic treatment would you like to buy?”

If someone tells me their legs feel heavy, or shows me swelling that has changed, I want to hear the story first. What do they notice? What has happened to their body? What do I see and feel? What might need checking by somebody else? Only then does it make sense to talk about what might help.

The tool comes after the thinking.

You can book a treatment with me here with initial Manual Lymphatic Drainage