Leg swelling is one of those symptoms that gets normalized quickly. It’s worse by evening, it improves overnight, your shoes have been tighter for a couple of years, and somewhere along the line you stopped mentioning it.
But a swollen leg is not one condition. It’s a symptom with a long list of possible causes, and they’re distinguished less by how much the leg is swollen than by a handful of specific, observable features.
This article works through those features one at a time. It won’t tell you what you have — only an examination can do that — but it will help you notice the things that actually matter and describe them accurately to a clinician.
One thing before you read on. If you have swelling in one leg that came on over hours or days, particularly with calf pain, warmth, redness, or tenderness, stop reading and seek medical care today. That combination can indicate a blood clot, and it’s an emergency. The same applies to sudden swelling with breathlessness or chest pain.
Sign One: Can You Pinch the Skin at the Base of Your Second Toe?
This is called the Stemmer sign, and it’s one of the more useful bedside tests in this whole area.
How to do it: Try to pick up and tent a fold of skin on the top of your second toe, at the base where it meets the foot. Compare with the other foot, and if you can, with someone else’s.
What it means: If you can’t lift a fold of skin — if it feels thickened and won’t tent — that’s a positive Stemmer sign, and it points toward lymphedema. It’s described in the medical literature as a useful distinguishing aid in lower limb swelling.
The caveat: A positive sign is meaningful. A negative sign doesn’t rule lymphedema out, particularly early on.
Sign Two: Does It Dent When You Press?
How to do it: Press a thumb firmly into the swollen area for about ten seconds, then let go and look.
Pitting — a dent that stays for a while — indicates fluid that can be displaced. This is common in earlier lymphedema, in venous problems, and in swelling from heart, kidney, or liver causes.
Non-pitting — where the tissue is firm and doesn’t dent — suggests the swelling has moved beyond simple fluid into tissue changes. In lymphedema, this typically indicates a later stage where fibrosis and fatty deposition have developed.
Why this matters practically: Pitting swelling is generally more responsive to treatment than firm, fibrotic tissue. It’s one of the strongest arguments for not waiting.
Sign Three: Does It Involve the Foot and Toes, or Stop at the Ankle?
This one distinction sorts a great deal.
Swelling that includes the foot and toes is characteristic of lymphedema. The whole limb, including the foot, is typically affected.
Swelling that stops abruptly at the ankle, leaving the feet normal, is a hallmark of lipedema — sometimes described as a cuff sign or ankle cutoff. It looks as though the person is wearing a swollen legging that ends above normal feet.
Swelling concentrated around the ankles and lower legs, worse by evening, is more typical of chronic venous insufficiency.
Sign Four: One Leg or Both?
One leg, or clearly asymmetrical: Lymphedema tends to be uneven, often affecting one limb noticeably more than the other. Acute one-sided swelling requires urgent assessment to rule out a clot.
Both legs, symmetrically: Chronic bilateral leg swelling is most commonly due to venous obstruction — stasis edema. Less commonly it reflects lipedema or primary lymphedema. Symmetrical swelling can also point toward heart, kidney, liver, thyroid, or medication causes, which is why bilateral swelling deserves a medical workup rather than assuming it’s a local problem.
Sign Five: What Does Overnight Do?
Substantially better by morning: Suggests fluid that redistributes when you lie down — common in venous problems and in earlier-stage lymphedema.
No longer improving overnight: In lymphedema this generally marks a transition to a later stage, where tissue changes rather than mobile fluid dominate. It’s a meaningful change worth reporting.
Sign Six: What Does the Skin Look Like?
Brown or reddish-brown staining around the ankles, visible varicose veins, dry itchy patches, or a history of ulcers point strongly toward venous disease. Lymphedema doesn’t typically produce varicose veins or that brown staining.
Thickened, firm skin with deepened folds, sometimes with a cobbled texture suggests longstanding lymphedema.
Skin that looks essentially normal over swollen tissue, with easy bruising is more consistent with lipedema.
Sign Seven: Does It Hurt to Touch?
Painful to light touch, tender, bruises easily, with a mattress-like or nodular feel under the skin, particularly on the thighs: These features are characteristic of lipedema, and they’re a significant part of what distinguishes it. Lipedema fat is notably painful in a way that ordinary fat is not.
Heavy, tight, and aching but not especially tender: More typical of lymphedema.
Aching and heavy, worse after standing all day, relieved by elevation: More typical of venous insufficiency.
Two Things Worth Knowing About Overlap
These conditions coexist frequently, and they cause each other.
Chronic venous insufficiency can overload the lymphatic system to the point of producing secondary lymphedema — the relationship is close enough that clinical practice guidance has suggested patients with chronic venous insufficiency should be considered to have lymphedema. Untreated, this can permanently damage lymphatic structures.
Similarly, lipedema can progress to involve lymphatic impairment, a combined picture sometimes called lipo-lymphedema.
Body weight is a genuine factor. The risk of lymphatic dysfunction rises with body mass index, because higher BMI is associated with reduced uptake of fluid by lymphatic vessels. Obesity-related lymphedema is increasingly recognized and is not the same thing as simply being large.
The practical implication of all this: “which one is it?” often has a more complicated answer than one label, and a good assessment accounts for all the contributors rather than picking one.
Why Getting This Right Matters
Because the treatments differ substantially.
Venous disease may need vascular assessment and specific vein treatment. Lymphedema needs complete decongestive therapy — compression, manual lymphatic drainage, exercise, and skin care. Lipedema doesn’t respond to dieting in the way ordinary fat does and needs its own approach. Swelling from heart, kidney, liver, or medication causes needs medical management of the underlying issue.
Being treated for the wrong one wastes time in a condition where earlier intervention consistently produces better outcomes.
Get Medical Care Promptly For
Today: one-sided swelling developing over hours or days, especially with calf pain, warmth, or redness. Any swelling with breathlessness or chest pain. Sudden redness, warmth, and tenderness in a swollen limb, particularly with fever — this may be cellulitis and needs antibiotics rather than waiting.
Soon: new swelling you can’t account for. Swelling with significant weight change. Swelling alongside breathlessness on exertion, or waking at night breathless. Any wound or ulcer that isn’t healing. Swelling that’s progressing despite elevation and compression.
What to Bring to an Assessment
Which leg, or both. When it started and how quickly. Whether it improves overnight. Whether it pits. Whether the feet are involved or spared. Any skin changes. Whether it’s painful to touch. Your medication list, since a number of common drugs cause swelling. Any history of clots, cancer treatment, surgery, radiation, or injury to the leg, groin, or abdomen.
That handful of details narrows the field considerably.
Let’s Work Out What You’re Dealing With
Chronic leg swelling gets tolerated for years before anyone examines it properly. It’s usually more treatable than people assume, and consistently more treatable earlier.
Highland Physical Therapy offers a free discovery visit at no cost and no obligation. You’ll get a proper assessment of your limb — including the specific tests described above — and a clear explanation of what’s likely driving your swelling and what can be done about it.
If your presentation needs vascular assessment or medical investigation, we’ll tell you plainly and help you get there.
