"My legs are swollen" can mean very different things. The difference between lymphedema, lipedema and venous edema isn't a minor technicality: each has a different cause and, above all, a different treatment. Telling them apart correctly is the first step.
Venous edema
This is swelling caused by venous insufficiency: the valves in the veins close poorly and blood pools in the legs. Its typical trait is that it improves when the leg is raised and worsens by the end of the day. It's usually accompanied by varicose veins, itching, cramps or color changes in the calves.
We cover this in the article on swollen legs and on the varicose veins and venous insufficiency page.
Lymphedema
This is the build-up of lymph caused by poor drainage of the lymphatic system. Unlike venous edema, it doesn't fully go down with rest, also affects the back of the foot or hand, and hardens the skin over time. It usually starts in a single limb and sometimes follows surgery or radiotherapy. You'll find more on the lymphedema page.
Lipedema
This is an abnormal build-up of fat, almost always in women, that affects the hips, thighs and legs symmetrically and spares the feet (a step-like border is noticeable at the ankle). It's painful to the touch, bruises appear easily, and it doesn't respond to diet the way ordinary fat does. It isn't obesity, although it's often mistaken for it.
Quick comparison
| Venous edema | Lymphedema | Lipedema | |
|---|---|---|---|
| When the leg is raised | Improves considerably | Barely goes down | No change (it's fat) |
| The feet | Usually not affected | Affected (back of foot and toes) | Spared |
| Symmetry | One or both | Usually starts in one | Symmetrical, both legs |
| Pain to the touch | Little | Little | Yes, and bruises easily |
| Who it affects | Both sexes, though more common in women | Both sexes | Almost always women |
In my clinic I see swollen legs every day labeled as "poor circulation" that are actually lipedema or lymphedema. Getting the diagnosis right changes everything, because the treatment for each one is different.
Why it matters to tell them apart
Because the approach changes completely: venous edema is treated by addressing the venous insufficiency; lymphedema with skin care, manual drainage or pneumatic compression and compression garments; and lipedema has its own management. They also aren't mutually exclusive: they can coexist. That's why diagnosis is made by a specialist assessing the whole picture.
In summary
Lymphedema, lipedema and venous edema are alike in that they swell the legs, but they are different conditions. Venous edema improves when the leg is raised; lymphedema doesn't go down and affects the feet; lipedema is symmetrical fat that spares the feet and hurts. If you have swollen legs without a clear explanation, a vascular assessment can put a name to the problem and point to the right treatment.