Lipoedema or lymphoedema? How can they be distinguished?

Why is distinguishing between them important?

The aim of this article is to provide practical guidance on distinguishing between the two conditions – by comparing visual signs, clinical tests and treatment strategies. The exact diagnosis is always made by a specialist (lymphologist, vascular surgeon), but the information below will help you understand the situation and prepare for a well-informed consultation.

Anatomical and pathological basis – what happens in the tissues?

The two conditions affect different tissue layers and cause swelling through different mechanisms.

In lipoedema, the subcutaneous fatty tissue accumulates abnormally and symmetrically. The cause is complex: a polygenic genetic predisposition, hormonal factors (oestrogen sensitivity) and chronic, low-grade inflammation. The increased fat mass is painful and tender and bruises easily. The lymphatic system is initially intact – it becomes secondarily affected only in stages 3–4 because of mechanical tissue pressure.

In lymphoedema, the capacity of the lymphatic system is reduced or obstructed. This may be congenital (primary lymphoedema – rare, a developmental disorder) or secondary, caused by an external event (surgery, radiotherapy, injury, infection or chronic venous congestion). The movement of protein-rich fluid between the tissues is impaired, increasing local inflammation and eventually causing connective-tissue scarring (fibrosis). The skin remains intact, but the tissue gradually becomes harder.

Because of these two fundamental differences, the treatment is also different:

• For lipoedema, the main aims are: controlling abnormal fatty tissue + reducing inflammation + stabilising quality of life.
• For lymphoedema, the main aims are: draining fluid + slowing tissue changes + preventing infection.

The detailed clinical background is available in the guides Lipoedema (fat oedema): symptoms and treatment and Lymphoedema – its forms, causes and stages.

Visual and symptom-based distinction

The detailed table below summarises the 8 main differences used in clinical practice. A person with no health problems can also work through it themselves:

The key message from the table is that the two conditions have clear clinical features which, in most cases, already provide guidance before a specialist examination.

Clinical tests and examinations

Four main clinical examination methods are used for an accurate differential diagnosis. Some can be performed at home, while others require consultation with a specialist.

1. Stemmer sign (can also be performed at home)

This is the classic clinical test for diagnosing lymphoedema. Try it: use your fingers to lift a fold of skin at the base of the second toe. If it can easily be lifted into a fold (negative Stemmer sign) → you probably have lipoedema. If the skin CANNOT be lifted (positive Stemmer sign) → you probably have lymphoedema. The test is not infallible, but in clinical practice it is a strong initial indication.

2. Pitting test (can also be performed at home)

Press the oedematous area with your fingers for 5–10 seconds, then remove your fingers. If a visible indentation remains and returns to normal within minutes → the result is pitting-positive (typical of stage 1 lymphoedema). If there is no visible indentation → it is probably lipoedema or lymphoedema at an advanced stage (above stage 2). This test detects the presence of fluid – lipoedema primarily involves tissue mass rather than fluid, so pitting is absent or minimal.

3. Limb measurement with a tape measure (at home or by a specialist)

Measuring the circumference of a limb at the same point each week with a tape measure helps assess trends (the direction of change). In lipoedema, the two sides are approximately symmetrical (the two thighs are the same size); in lymphoedema (especially secondary/BCRL), the affected side is significantly larger. A difference of more than 2 cm is an early indication.

4. Bioimpedance spectroscopy (BIS) – specialist examination

This is a modern, sensitive method that measures extracellular and intracellular fluid volume. It is very useful for the early detection of BCRL (before symptoms appear!). It may be available at the clinics of clinical lymph therapists and lymphology specialists.

5. Lymphoscintigraphy and MR lymphangiography – specialist hospital examination

These imaging procedures are used to establish the final diagnosis in more complex cases (e.g. congenital primary lymphoedema or lipo-lymphoedema). They show the function and anatomy of the lymphatic vessels accurately. The examination is performed in a specialist hospital.

Lipo-lymphoedema – when both conditions are present

Lipo-lymphoedema is the clinical situation in which lymphoedema develops secondarily in a patient with lipoedema, usually at stages 3–4. The typical progression is:

1. Stage 1 lipoedema develops (smooth skin, tender tissue),
2. over years or decades, it progresses to stages 2–3 (mattress-like skin, coarse rippling),
3. the increased tissue mass mechanically compresses the lymphatic vessels and lymph nodes,
4. the capacity of the lymphatic system decreases, and soft, fluid-like swelling appears in the limb, which was already enlarged,
5. finally, the typical lipoedema features (bilateral, feet spared) and lymphoedema features (foot involvement, positive Stemmer sign) appear together.

Treatment of lipo-lymphoedema combines the treatment strategies for the two underlying conditions: the elements of complex decongestive therapy (CDT) (compression garment + manual or machine lymphatic drainage + skin care + exercise) are primary. Pneumatic compression is recommended at low pressure (30–40 mmHg) and under the supervision of the treating doctor. Surgical options (lipoedema-oriented liposuction +, in some cases, LVA or VLNT) may also be considered – details are available in the guide Lymphatic reconstruction surgery.

The stage-specific treatment strategies for lipoedema are described in detail in the cluster article Lipoedema stages 1–4.

What does the distinction mean for treatment?

Diagnostic accuracy also determines the treatment strategy. The table below summarises the most important differences:

When should you see a specialist?

An accurate diagnosis – whether lipoedema or lymphoedema – is always the responsibility of a specialist (lymphologist, vascular surgeon or plastic surgeon with a lipoedema practice). Consultation is particularly important in the following situations:

• Persistent, unexplained swelling: whether symmetrical (suggestive of lipoedema) or unilateral (suggestive of lymphoedema), persistent swelling warrants consultation with a specialist.
• New swelling after cancer surgery: consult a lymphologist if arm or leg swelling develops after treatment for breast, cervical or prostate cancer – even years later.
• Uncertain clinical picture: if the home examination (Stemmer sign, pitting test) gives an uncertain result, or the symptoms do not clearly fit either condition.
• Recurrent skin infection (erysipelas, cellulitis): a typical complication of both conditions – recurrent episodes require a specialist treatment protocol.
• Considering a surgical option: liposuction or microsurgery (LVA, VLNT) may be considered for stage 3–4 lipoedema or severe lymphoedema. Details are available in the guide Lymphatic reconstruction surgery.

The specialist perspective from clinical practice is presented in the interview with surgeon Dr Balázs Mohos.

Clinical evidence in the treatment of the two conditions

The evidence base for the two conditions has developed differently over the past decade. The studies below support the development of indication-specific protocols.

The evidence base for the two conditions therefore has a different focus: in lymphoedema, fluid volume and prevention are the central topics; in lipoedema, the focus is tissue volume, pain and quality of life. This explains why an accurate diagnosis is needed when selecting the treatment protocol.

More in-depth guides in the cluster

Guides belonging to the two pillars:

• Lipoedema (fat oedema): symptoms and treatment – pillar guide
• Lipoedema stages 1–4 – stage-specific guide
• Lipoedema–fat oedema category – stage-specific product recommendations
• Lymphoedema – its forms, causes and stages – pillar guide
• Treating lymphoedema at home – conservative treatment protocol
• Lymphatic drainage – manual and machine lymphatic massage – physical methods
• Lymphatic reconstruction surgery – surgical options
• Radiotherapy and lymphoedema – BCRL context
• Lymphatic massage machine – multi-indication hub – device selection
• Lymphatic massage machine – what is it for and how do you choose one? – technical guide