The Connection Between EDS and Varicose Veins

Ehlers-Danlos syndromes (EDS) and varicose veins share a common thread: collagen. EDS is a group of inherited conditions in which the body produces structurally abnormal or insufficient collagen, and since collagen is a key structural component of vein walls, veins in people with EDS tend to be more distensible and fragile than normal. The degree of vascular vulnerability varies among EDS subtypes but has been observed across all of them.¹ That connection plays out in ways that go well beyond cosmetic spider veins, affecting everything from standing tolerance to surgical decision-making.

How Collagen Defects Lead to Varicose Veins

Veins rely on collagen-rich walls to hold their shape against the pressure of blood flowing back toward the heart. In people with EDS, those walls are weaker than they should be. When a vein wall gives way even slightly, it can bulge outward, and that bulging pulls the tiny internal flaps (valves) apart so they no longer close properly. Research on varicose vein formation in the general population shows that vein wall dilation often precedes valve failure rather than the other way around: the wall stretches first, the valve becomes incompetent as a consequence, and reflux follows.² In EDS, this process has a head start because the vein wall is structurally compromised from the beginning.

The vascular subtype of EDS (vEDS), caused by defects in type III collagen, involves the most dramatic vein and artery fragility. Type III collagen is a major structural component of blood vessel walls and hollow organs, so when it is defective, medium and large blood vessels can become dangerously fragile.³ But the effect is not limited to vEDS. Even in subtypes where the primary collagen defect involves type V collagen (classical EDS) or other proteins, the resulting changes to connective tissue structure still leave vein walls more prone to stretching and valve failure than in people without the condition.

Which EDS Subtypes Show Varicose Veins

A systematic review of vascular problems in non-vascular EDS subtypes found varicose veins cropping up across multiple types, though the numbers varied. In classical EDS (cEDS), about 6% of reviewed patients had documented varicose veins. Among those with mutations in COL1A1 rather than the more common COL5A1 gene, the rate was higher, around one in four. A quarter of patients with spondylodysplastic EDS linked to SLC39A13 mutations also had varicose veins. Deep vein thrombosis appeared too, including in a teenager with kyphoscoliotic EDS.⁴ Nearly all of the patients with varicose veins were over 40, suggesting that the cumulative effect of decades of hydrostatic pressure on weakened vein walls eventually tips the balance.

Hypermobile EDS (hEDS), the most common subtype, is harder to pin down with formal prevalence figures because it lacks a known genetic marker and is diagnosed clinically. However, varicose veins and related venous complaints are frequently reported by patients with hEDS. Qualitative studies of people with non-vascular EDS confirm that circulatory problems including varicose veins are part of patients’ lived experience and often contribute to pain and reduced quality of life.⁵

Venous Pooling and Standing Intolerance

Varicose veins in the general population are often treated as a cosmetic nuisance. In EDS, they can be a sign of a deeper functional problem: excessive venous pooling. Because EDS-affected veins distend more than normal under ordinary gravitational pressure, blood collects in the legs when a person stands still. Researchers have proposed that this abnormal connective tissue in dependent blood vessels is what permits veins to stretch excessively in response to ordinary hydrostatic pressures, leading to increased pooling and its downstream consequences.⁶

Those consequences include dizziness, lightheadedness, brain fog, and a racing heart upon standing, a cluster of symptoms often diagnosed as postural orthostatic tachycardia syndrome (POTS). The overlap between EDS, POTS, and visible varicose veins is not a coincidence. They share the same root cause: veins that stretch too easily. When blood pools in the legs, less returns to the heart per beat, the heart rate spikes to compensate, and the person feels terrible. This means that for someone with EDS, developing noticeable varicose veins can coincide with worsening orthostatic symptoms, and both problems benefit from strategies that limit pooling.

Pelvic Venous Problems and Compression Syndromes

Varicose veins in EDS do not just show up in the legs. Pelvic veins are also vulnerable, and a constellation of problems can develop when those veins become dilated or compressed. Pelvic congestion syndrome, in which enlarged pelvic veins cause chronic lower abdominal pain, painful periods, discomfort during or after intercourse, and sometimes urinary symptoms, has been documented in EDS patients. These symptoms can be linked to conditions like nutcracker syndrome, in which the left renal vein is compressed between two arteries, leading to increased pressure and dilation of downstream pelvic veins.⁷

May-Thurner syndrome, where the left iliac vein is compressed by the overlying right iliac artery, is another vascular compression issue reported in EDS patients. Researchers have suggested that EDS-related tissue laxity and organ mobility may contribute to the risk of these compression syndromes by allowing pelvic structures to shift in ways that pinch veins.⁸ These conditions are probably underdiagnosed in the EDS population because the symptoms (chronic pelvic pain, swelling, heaviness) overlap with so many other EDS-associated complaints that clinicians may not think to image the pelvic veins.

Why Treating Varicose Veins in EDS Is Complicated

In the general population, varicose vein treatment has become routine. Thermal ablation, foam sclerotherapy, and stripping procedures are performed in outpatient settings with low complication rates. In EDS, every one of those procedures carries higher stakes because the veins themselves are fragile. A case report of a patient with vascular-type EDS who underwent surgery for varicose veins illustrates the extreme end of this risk: the surgeon caused severe damage to the common femoral vein during the procedure, and the same patient later suffered a spontaneous rupture of the external carotid artery. The authors concluded that surgery in vEDS patients is hazardous and should be avoided if possible.⁹

Even in less dramatic cases, the tissue quality is a problem. One case report described phlebectomies (small vein removals) that turned out to be “near impossible” because the veins were so friable, essentially crumbling when handled.¹⁰ In that case, the clinicians pivoted to endovenous laser ablation and foam sclerotherapy, which succeeded in closing the treated veins without needing to physically strip them out.

The tension in surgical decision-making is real. A case series on varicose vein treatment in vEDS patients described one patient who underwent miniphlebectomy successfully and a second patient whose genetic testing confirmed vascular-type EDS, leading the team to refuse surgical treatment entirely because the risk of vascular rupture and postoperative complications was judged too high.¹ There is no one-size-fits-all answer. The subtype, the severity of the vein disease, the patient’s surgical history, and the specific procedure all factor into whether intervention makes sense.

Endovenous Laser Ablation as a Middle Ground

Because open surgery on fragile veins is risky and doing nothing may not control symptoms, clinicians have been looking for less invasive options. Endovenous laser ablation (EVLA), in which a thin fiber is threaded into the vein and heat is applied from the inside to seal it shut, avoids the mechanical trauma of stripping or pulling on fragile tissue. A recent pair of case reports described using a 1940-nanometer laser with a radial fiber to close insufficient truncal veins near the saphenofemoral junction in two EDS patients. Both procedures achieved vessel closure without intraoperative or postoperative complications.¹

The authors described this approach as a middle ground between conservative management (compression, lifestyle changes) and open surgery, particularly suitable for EDS patients whose symptoms are not adequately controlled by conservative measures alone. It is still early days for this specific technique in EDS patients, and the evidence is limited to case reports rather than controlled trials. But the rationale is sound: seal the vein from inside rather than handling it from outside, and you sidestep much of the fragility risk.

Foam sclerotherapy, in which a chemical foam is injected to irritate and close the vein, is another minimally invasive option that has been used in EDS patients. The case that found phlebectomies nearly impossible ultimately achieved successful vein closure through a combination of laser ablation and ultrasound-guided foam sclerotherapy, with imaging at 18 months confirming the treated veins had effectively atrophied.¹⁰

Compression Garments and Everyday Management

Compression stockings are the first-line non-surgical treatment for varicose veins in anyone. In EDS, they serve double duty: they support weakened vein walls to reduce pooling, and they may help with the orthostatic symptoms that come from excessive venous distension. There is a catch, though. EDS skin tends to be more fragile, bruises easily, and may be prone to scarring, which raises the question of whether tight garments do more harm than good.

A prospective study of compression garments in non-vascular EDS found that while some patients experienced minor itching or rashes, these were generally not serious and rarely required treatment. The garments mostly had no negative effect on skin bruising, stretch marks, wounds, or scarring, and in the few cases where changes were noticed, they were more often improvements than worsening.¹¹ A separate retrospective study of compression garments in hypermobile EDS and hypermobility spectrum disorders found that they were well tolerated and associated with meaningful reductions in pain and analgesic use.¹²

For someone with EDS and visible or symptomatic varicose veins, compression garments are worth trying as a low-risk intervention. The practical advice is to start with a garment designed for sensitive skin, monitor for any irritation, and increase wear time gradually. Medical-grade graduated compression stockings (which are tighter at the ankle and loosen as they go up the leg) are better for venous support than generic compression sleeves. Getting a proper fitting from a specialist familiar with EDS can help avoid pressure injuries on fragile skin.

Capillary Fragility and Easy Bruising

Varicose veins are the most visible venous problem in EDS, but they sit on a spectrum of vascular fragility that extends down to the smallest blood vessels. Easy bruising is present to some degree in all EDS subtypes and is caused by fragility of the capillaries and the connective tissue surrounding them. Standard blood tests for clotting factors and platelet function typically come back normal in EDS patients, which can be confusing when someone bruises from minimal contact. The one test that tends to be abnormal is the Hess test, which specifically measures capillary fragility.³

This is worth understanding because people with EDS sometimes undergo extensive hematologic workups looking for a bleeding disorder to explain their bruising, only to be told everything is normal. The problem is not in the blood; it is in the vessels and the tissue supporting them. The same connective tissue weakness that allows large veins to dilate into varicose veins allows tiny capillaries to leak more easily under pressure. Recognizing this shared mechanism can save patients from unnecessary testing and help clinicians focus on the structural rather than hematologic side of the problem.

When Varicose Veins Signal Something More Serious

Most varicose veins in EDS, as in the general population, are not dangerous. They are uncomfortable, often unsightly, and can contribute to leg heaviness, aching, and skin changes over time. But in certain EDS subtypes, varicose veins can be a marker for a circulatory system that is more globally fragile. Patients with vascular EDS who develop varicose veins may also be at risk for spontaneous arterial rupture, organ perforation, and deep vein thrombosis. The 21-year-old vEDS patient described in one case series had a history of recurrent deep vein thrombosis, nosebleeds, and hematomas from minimal trauma before varicose veins even became the clinical focus.¹

For this reason, new or progressive varicose veins in someone who already has or is being evaluated for EDS should prompt a broader vascular assessment rather than a quick referral to a cosmetic vein clinic. Duplex ultrasound can map the extent of venous reflux and identify deep venous involvement. In cases where pelvic symptoms are present, imaging for compression syndromes like nutcracker or May-Thurner syndrome may be warranted. The goal is not to alarm but to make sure the veins being seen on the surface are not the tip of a larger vascular problem that would change the management approach.

People with EDS who are told their varicose veins are “just cosmetic” and offered the same quick-fix treatments available to the general population should push back gently and make sure their provider knows about their connective tissue diagnosis. The treatment itself may need to be different, the risks are higher, and the veins may be telling a story about systemic vascular fragility that deserves more than a topical solution.