🌊 Lymphatic Dysfunction & Pain: Why Your Joints, Your Gut and Your Head Are All Talking at Once
You came in for a sore back. Or a stiff neck. Or a sore abdomen. Or a hip that won't let you squat, run or sleep on your side.
Then I asked you a run of questions that probably seemed to have nothing to do with any of that.
Do you get foggy brain? Any difficulty with memory or concentration? Have you been more irritable, or more sensitive about things than you'd like — or more than usual? Any reflux, indigestion or heartburn? Do you get bloated? Loose bowels, or constipation? Are there other parts of your body that are sore, that nothing really explains?
And you said yes to several of them. Possibly most.
Here's what matters about that: you didn't come in to tell me any of it. You wouldn't have raised it. Not because you were hiding anything — but because it stopped registering as a symptom a long time ago. It became just how you are. Just getting older. Just stress. Just your gut, which has always been a bit like that.
That is exactly why I ask. And the fact that it took a direct question to surface it doesn't make it less relevant. It makes it more relevant, because it means it has been going on long enough to become your normal.
Those answers aren't a side issue. They're part of the diagnosis.
If I've told you that your lymphatic and visceral systems are contributing to your pain and movement problems, this article explains what I meant, why your abdomen is part of the picture, and exactly what you can do between sessions to hold onto the change we make.
🩺 First: what this diagnosis is — and what it isn't
Let's be precise, because this matters.
What I have found in you: signs and symptoms that your body's fluid drainage systems are not moving fluid well, and that this congestion is changing how your muscles, joints and spine behave. I've assessed this three ways — through those screening questions, through hands-on assessment of tissue texture and tenderness at the drainage sites, and by re-testing your movement and your painful joints immediately after treating those sites. When your movement and your pain change within seconds to minutes of treating a drainage pathway, that's not a coincidence. That's information.
It's also why the order of your assessment may have looked unusual. The more of those questions you answered yes to, the more likely I checked your drainage systems before I assessed your movement — because at that point it's no longer a side investigation. It's the leading candidate for what's driving your symptoms, and I want to know what your movement looks like once the fluid is moving.
What this is not: it is not lymphoedema, it is not a diagnosis of a gut disease, and it is not a replacement for medical investigation. If you have red flags, I will refer you — and if you're ever unsure, see your GP. More on that at the end.
🚰 Your lymphatic system has no pump
Here's the single most useful fact to understand about your own body.
Your heart pumps blood. Nothing pumps your lymph.
Your lymphatic system is the drainage network that collects fluid, waste, proteins and immune cells from the spaces between your cells and returns them to your bloodstream. It has vessels and it has nodes — but it has no central pump. It relies entirely on:
Your diaphragm moving as you breathe
Your muscles contracting as you move
Pressure differences between your chest, abdomen and limbs
Which means the system is uniquely vulnerable to the way most of us now live: sitting still, breathing shallowly into the top of the chest, under-hydrated, under-slept, and holding tension through the neck, jaw and ribs.
When drainage slows, fluid lingers. Waste lingers. And tissue that is sitting in stagnant fluid becomes sensitive, stiff and protective. That is where your pain and your movement restriction are coming from — or at least, a large part of it.
🧠 Your brain drains too
This is the part that usually makes people sit up.
Your brain has its own drainage system — the glymphatic system. It flushes the waste products that build up while you're awake, moving them out of the brain and down into the lymph nodes in your neck.
Three things drive that flow:
Breathing — your diaphragm creates the pressure changes that move the fluid
Hydration — the channels that let the water through are literally water channels, and they need water to work
Your heartbeat — the rhythmic pulse that helps push fluid along
And it works hardest during deep sleep.
So when deep sleep is short, when hydration is low, when breathing is shallow — waste clearance drops. What follows is a remarkably consistent cluster. It is, almost word for word, the list I asked you about:
Foggy brain
Memory and concentration difficulties
Mood disturbance — irritability, feeling more sensitive than you'd like
Reflux or indigestion
Bloating
Loose bowels or constipation
Pain, and increased sensitivity to pressure, movement, stretch and strain
Notice that only the last one is a reason anybody books a physiotherapy appointment. The rest are the ones people simply put up with. That's the whole problem with waiting for patients to volunteer them — by the time a symptom has been tolerated for two years, it doesn't feel like a symptom any more. It feels like a personality trait.
And that last one is the bridge. The inflammation that comes with poor clearance doesn't stay in one place. It turns the volume up on your whole system — which is why a body that isn't draining well tends to have several sore spots rather than one, and why things hurt more than the injury alone should explain.
🤕 Why your belly hurts — and why it shows up in your back and hips
This is the part almost no one has explained to you before.
Your abdominal organs are not loose in a bag. They're wrapped, slung and tethered by a continuous system of membranes and fascia — the peritoneum, the omenta, the mesentery — and those tethers attach to the back of your abdomen, right onto your lumbar spine, your diaphragm and your pelvis.
So an abdomen that isn't moving and draining freely is not just an abdomen. It's a tension and pressure problem anchored to your spine.
A few specifics worth knowing:
The bends in your colon — under your liver on the right, under your spleen on the left — are natural corners where things can bank up, like a kink in a hose. Congestion there changes pressure and mobility through the whole upper abdomen and lower ribs.
The mesentery that slings your small intestine attaches diagonally across the back wall of your abdomen. Tension through it is asymmetrical by design — which is one reason abdominal congestion can show up as a one-sided low back or sacroiliac problem.
The sigmoid colon sits in your pelvic bowl, and fluid behaviour down there influences the tone of the membrane lining your pelvis — which influences hip, pelvis and lumbar mobility.
Your oesophagus can refer pain to the front of your chest and your mid-back, in patterns that look a lot like liver, gallbladder or duodenal referral. If you have stubborn upper trapezius or thoracic pain that never quite responds to treating the muscle, this is one of the reasons I check it.
Your psoas — the hip flexor everyone wants "released" — sits behind skin, fat, three layers of abdominal wall, the lining of the abdomen, the omentum and its fat, the small intestine and the colon. Every one of those layers has its own nerves and its own sensitivity. Which is why I treat the layers and the fluid in front of it rather than digging for the muscle. Jabbing at a psoas through a congested abdomen mostly just hurts.
So when I ask about your bloating, your reflux or your bowels while you're lying there with back pain, I'm not changing the subject. I'm staying on it.
🫁 The breathing link
If you take one mechanical thing away from this article, make it this one.
Dysfunctional breathing — breathing into the upper chest instead of using the diaphragm, with the ribs and abdomen moving out of sync — is strongly linked to persistent pain. Roughly 50% of people with low back pain, and 83% of people with anxiety, show some form of it.
It's a double hit:
The diaphragm is your main lymphatic pump. Shallow breathing means less drainage from your abdomen, your chest and ultimately your brain.
The diaphragm is also a postural and spinal control muscle. When its position and timing change, your spine loses part of its support strategy.
When breathing retraining has been added for people whose recovery had plateaued on manual therapy and exercise alone, pain and function have improved. That's not an accident — it's the pump coming back online.
✅ The 6 critical factors for a lymphatic system that works
This is the framework I teach to clinicians, and it's the same one I want you to use at home.
Hydration
Adequate deep sleep
Diaphragmatic function (how you breathe)
Visceral movement (how freely your organs glide)
Flow through the lymphatic system (the drainage pathways themselves)
Musculoskeletal movement (how much, and in how many directions, you move)
My hands can do something about numbers 3, 4 and 5 in the clinic.
You own 1, 2 and 6. And without them, what we achieve in the clinic won't stick. Here's what they look like in practice.
💧 1. Hydration
Those water channels in your brain and tissues cannot work without water. Practically:
35–40 mL per kg of body weight per day as your baseline. For an 80 kg person, that's 2.8–3.2 L/day before exercise.
Add about 1 mL for every 4 kJ of active energy you burn. Your phone or watch already tracks active energy.
In hot weather or heavy training, your needs can rise substantially — sweat losses of several litres a day are realistic in the heat.
One honest warning, because it affects your appointments: if you arrive dehydrated, your tissues respond slowly to this work, or not at all. It is genuinely worth arriving well hydrated.
I've written in more detail about this in Hydration & Pain Relief: What Your Joints and Muscles Are Thirsty For.
😴 2. Adequate deep sleep
Not just hours in bed. Deep sleep, because that's when brain clearance runs hardest.
Adults aged 18–60 need 7+ hours, with around 25% of it deep — roughly 1.5 to 2 hours of deep sleep.
You cycle through the stages 4–5 times a night, in cycles of about 90–110 minutes. Deep sleep is weighted toward the earlier cycles, which is why a late bedtime costs you disproportionately.
What commonly steals your deep sleep:
Alcohol. It makes you drowsy, then fragments your sleep and reduces its efficiency.
Sugar late at night — including dessert and late fruit. The glucose spike and subsequent crash can trigger a stress-hormone response that wakes you.
Late coffee. Watch the timing of your last one.
Late meals, through indigestion and reflux.
Large volumes of water right before bed — you'll be up to the toilet. Hydrate across the day instead of loading at night.
A raised body temperature, from a hot room, fever, or even a mild illness.
Interruptions from kids, partners and pets. Not always fixable — but worth naming honestly, because it changes what's realistic for you.
If you wear a watch overnight, look at your deep sleep number for a week. That one number tells us a lot.
🏃 3. Movement — and make it three-dimensional
Your muscles are the pump. No contraction, no drainage. But how you move matters as much as how much.
Multiplanar (3D) movement beats uniplanar movement. Walking in a straight line is good. Walking plus rotating, reaching, side-bending and changing levels is much better, because lymph drains through fascia that runs in every direction — not just forwards and back.
Get up and down off the floor. Floor-to-standing movement flows compress and decompress the abdomen, chest and limbs in sequence. It is one of the most effective drainage exercises there is, and it costs nothing.
Breathe into the movement. Diaphragmatic breathing is the pump. Holding your breath through exercise wastes the opportunity.
The specific movements I'll have prescribed you will come from this group — things like baby roll and reach, Brettzels, T-spine rotation with reach, seated trunk rotation and side bend, half-kneeling 3D hip work with arm drivers, halos, Indian club swings, inchworm to upward dog, warrior poses, windmills, and floor-to-standing flows. They look like mobility exercises. They're also drainage exercises. If you are more interested in having a session with me to explore those weird sounding exercises you can book in here.
🔄 What treatment actually feels like
This work is gentle, and the signs that it's working are unusual enough that I want you to know what to expect.
As your nervous system shifts out of "fight or flight" and fluid starts to move, you may notice:
Gurgles across your chest and abdomen
Trickling sensations, often behind the breastbone
An involuntary swallow
Your breathing dropping down into your belly, often with a sigh
A body part suddenly "letting go"
Small twitches
Occasionally, your ears popping
I call these tells. They're the body's signal that it's reorganising. The moment one happens, I stop and re-test the movement or joint that was painful — and that's the part that usually surprises people, because the change is often immediate and obvious.
It also means a session may look like I'm working somewhere apparently unrelated to where it hurts. Treating your abdomen for your hip. Treating your neck for your mid-back. I'm treating the drainage, then re-testing the pain.
🚩 When to see your GP instead
Manual therapy is not the answer to everything, and abdominal pain in particular deserves respect. Please see your doctor — not me — if you have:
Fever, unexplained weight loss, or night sweats
Blood in your stool or vomit, or black stools
Severe, worsening or unrelenting abdominal pain
A new, persistent change in bowel habit
Pain with chest tightness, breathlessness, sweating, or pain into the jaw or arm
A new or growing lump, or red, hot, swollen skin
Any known heart, kidney or liver condition, or an active infection, before starting this work
I also routinely screen for the conditions where lymphatic techniques aren't appropriate. If something in your history flags one of those, I'll tell you and we'll change the plan.
Final Thought: your pain might have a plumbing problem, not just a mechanical one
For years, musculoskeletal care has looked almost exclusively at joints, muscles and movement patterns. Those matter. I assess them in detail. But they sit inside a body that is 75% fluid, and that fluid has to move.
When it doesn't, tissue gets sensitive, movement gets guarded, your gut gets unhappy and your head gets foggy — all at once. That's the pattern your answers mapped out, even though you walked in about something else entirely.
The good news is that this changes quickly. Lymphatic and visceral behaviour isn't a fixed structural problem like a torn tendon — it's a behaviour, and behaviours can shift within a single session. What determines whether it stays shifted is what you do with your water, your sleep, your breathing and your movement between now and the next time I see you.
Flow changes function. The power is in you.
Greg Dea is an AHPRA-registered Performance Sports Physiotherapist. This article is general information for patients already assessed in clinic and does not replace individual medical advice.
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