Venous Ulcers vs. Lymphedema Skin Changes: What Each Looks Like and Why

Why Chronic Swelling Changes the Skin

Skin depends on a steady flow of fresh blood in and fluid out. When either side of that exchange breaks down for months or years, the skin and the fat beneath it start to change. In chronic venous insufficiency, high pressure in the leg veins pushes blood components and inflammatory substances into the surrounding tissue. ^{[1] [2]} In lymphedema, protein-rich lymph lingers in the tissue and drives ongoing inflammation and gradual remodeling. ^[3]

The result is two recognizable but different patterns. Knowing them helps explain what a clinician is looking at, though the patterns often overlap, especially when long-term vein disease has also damaged the lymphatic system. For background on how that overlap develops, see our chronic venous insufficiency vs. lymphedema guide.

Venous Skin Changes and Ulcers

Venous leg ulcers are a late sign of chronic venous insufficiency and the sustained high pressure in the leg veins (venous hypertension) that comes with it. ^[1] Before an ulcer forms, the skin usually passes through earlier changes:

• Brownish discoloration. Red blood cells leak into the tissue and leave behind iron-containing pigment (hemosiderin), staining the lower leg brown or rust-colored. ^[2]
• Itchy, scaly, inflamed skin. Often called stasis or venous dermatitis, this is common around the ankles. ^[2]
• Hardening of skin and fat (lipodermatosclerosis). Chronic inflammation causes fibrosis of the skin and underlying fat, and in advanced stages the lower leg can narrow above the ankle in a shape often described as an "inverted champagne bottle." ^[4]
• Ulceration. Venous ulcers typically form on the lower leg, most often around the inner ankle, and tend to be shallow with irregular edges. They are slow to heal and can recur. ^{[1] [2]}

Venous ulcers are a substantial health burden; in the United States, the annual cost of caring for them has been estimated at roughly $14.9 billion for payers. ^[1] Their underlying driver is the vein problem, which is why visible signs like varicose veins often accompany them.

Lymphedema Skin Changes

Lymphedema affects the skin differently. Because the retained fluid is rich in protein and fat, it triggers inflammation that gradually builds up fibrous and fatty tissue. Clinically, swelling that started out soft and pitting becomes firmer, the skin thickens, and the limb may become harder to move. ^[3] Characteristic changes include:

• Thickened, firm skin. A positive Stemmer's sign, an inability to pinch and lift the skin at the base of the second toe, reflects this thickening. ^[3]
• Hyperkeratosis and papillomatosis. In long-standing lymphedema, the skin surface can become rough and scaly, and small wart-like or cobblestone bumps can form, especially on the feet and toes. ^[5]
• Elephantiasis nostras verrucosa. A rare, advanced complication of chronic lymphedema with progressive skin overgrowth and a warty, disfiguring surface. ^[6]
• Leaking fluid. Very swollen skin can sometimes weep clear lymph fluid (lymphorrhea), and any break in the skin raises the risk of infection. ^[3]

Open ulcers are less typical of pure lymphedema than of vein disease, but they can occur, particularly when lymphedema and venous insufficiency coexist. ^[5] For the basics of how lymphedema develops and is staged, see our lymphedema causes and treatment guide.

Telling the Patterns Apart

• Color. Brown or rust-colored staining near the ankle points toward vein disease. Lymphedema skin is more often normal-colored or pale, though thickened. ^{[2] [3]}
• Texture. Venous changes often feel hard and tight around the lower leg (lipodermatosclerosis). Lymphedema tends to produce diffuse thickening, deep skin folds, and rough or wart-like surface changes. ^{[4] [5]}
• Feet and toes. Lymphedema commonly involves the top of the foot and the toes. Venous changes concentrate around the ankle and lower calf. ^{[3] [2]}
• Ulcers. Shallow, slow-healing sores near the inner ankle are classic for venous disease. Ulcers are less typical of lymphedema alone. ^{[1] [5]}

In practice, many people with long-standing leg swelling show features of both, and other causes of leg ulcers, including poor arterial circulation and diabetes, need to be ruled out. That's a job for a clinician, often with vascular testing.

Care, Infection Risk, and When to Get Help

Both patterns are managed by treating the underlying cause, and compression is central to both. For venous ulcers, compression therapy is a cornerstone of healing and preventing recurrence, typically after a clinician confirms that arterial circulation is adequate for it to be safe. ^[1] For lymphedema skin changes, decongestive therapy and compression reduce swelling, and specialist treatment of the skin itself may be added in advanced cases. ^{[3] [6]} Our compression garments guide explains how levels are chosen.

Gentle daily skin care matters in both: keeping skin clean and moisturized, checking for cracks or wounds, and treating small injuries promptly. Damaged skin over a swollen leg is an entry point for bacteria, and cellulitis, a spreading skin infection, is a well-recognized complication of lymphedema that can further damage the lymphatic vessels. ^{[3] [7]}