Can buttock pain when walking indicate iliac artery disease? 

Yes, buttock pain that occurs specifically when walking and subsides with rest is a classic clinical indicator of iliac artery disease. The iliac arteries are the large blood vessels in the pelvis that supply oxygenated blood to the hips and legs. When these vessels become narrowed by plaque, the muscles in the buttocks and thighs do not receive enough blood during physical activity. This leads to a type of cramping or aching known as buttock claudication, which is a significant form of Peripheral Arterial Disease (PAD). 

Identifying the exact location of walking-related pain is vital for a correct vascular diagnosis. While calf pain usually indicates a blockage in the thigh (femoral artery), pain in the buttocks, hips, or lower back during exercise strongly suggests that the problem is higher up in the pelvic region. This article explores the physiological causes of iliac artery disease, how to differentiate it from other conditions like sciatica, and the clinical steps taken in the UK to confirm a diagnosis. 

What We will cover in this Article 

• The anatomical role of the iliac arteries in leg circulation. 

• Why atherosclerosis in the pelvis causes buttock claudication. 

• Identifying the Leriche Syndrome triad of symptoms. 

• Clinical triggers that differentiate vascular pain from nerve pain. 

• The diagnostic role of pulse checks in the groin (femoral pulses). 

• Data-driven differentiation between vascular and neurogenic claudication. 

• Specialist imaging options for mapping pelvic arterial blockages. 

Anatomical role of the iliac arteries 

The iliac arteries serve as the primary ‘junction’ for blood flow between the abdominal aorta and the legs. They are divided into the common, internal, and external iliac arteries. The internal iliac artery is specifically responsible for supplying the gluteal muscles (the buttocks). If a blockage occurs in the common or internal iliac segments, the gluteal muscles are the first to experience ‘ischaemia’ or oxygen deprivation during exercise. 

Because these arteries are large, a significant amount of plaque must typically be present before symptoms occur. However, once the narrowing reaches a critical point, the impact on mobility is substantial. Patients often report that the pain feels deep within the buttock or hip and may even spread into the lower back or down the thigh. In men, iliac artery disease can also affect the blood supply to the pelvic organs, potentially leading to erectile dysfunction. 

Causes of buttock claudication 

The primary cause of iliac artery disease is atherosclerosis. This is the progressive buildup of fatty plaque that hardens and narrows the arterial walls. Over time, this restricts the volume of blood that can pass through the pelvic region. While the body is at rest, this restricted flow may be adequate; however, the act of walking requires the gluteal muscles to work harder, triggering a demand for oxygen that the narrowed iliac arteries simply cannot meet. 

Metabolic Drivers of Pelvic PVD 

• High Cholesterol: Provides the lipids that form the core of arterial plaque. 

• Hypertension: Mechanical stress from high blood pressure damages the delicate iliac lining. 

• Smoking: Chemicals in tobacco cause immediate pelvic vasoconstriction and long-term inflammation. 

• Diabetes: Accelerates the calcification of large pelvic vessels, making them stiff and narrowed. 

In some cases, a specific pattern of iliac disease known as ‘Leriche Syndrome’ occurs. This is characterised by a triad of symptoms: buttock or hip claudication, absent or weak femoral pulses in the groin, and erectile dysfunction. This indicates a blockage at the very top of the iliac arteries where they branch off from the aorta. 

Triggers for vascular buttock pain 

Vascular buttock pain has very specific triggers that help doctors distinguish it from other causes of hip pain. The pain is strictly ‘exertional’, meaning it is triggered by a predictable amount of physical activity and is relieved quickly by standing still. 

Clinical Triggers 

Activity-Induced Ischaemia 

Walking at a brisk pace or climbing stairs increases the workload on the gluteal muscles. If the iliac arteries are narrowed, the muscles switch to anaerobic metabolism, producing lactic acid that triggers the ache or cramp. 

Postural Triggers 

Unlike nerve-related pain, vascular buttock pain is not usually triggered by simple changes in posture, such as sitting down or bending over. It is the movement and the distance walked that act as the primary triggers. 

Differentiation: Vascular vs Neurogenic claudication 

It is common for buttock pain to be mistaken for sciatica or spinal stenosis. However, the ‘recovery’ pattern is the key differentiator. Vascular pain (iliac disease) is relieved by standing still for a few minutes. Neurogenic claudication (nerve compression in the spine) often requires the patient to sit down or lean forward (the ‘shopping trolley’ sign) to get relief. 

Differentiation Table: Iliac Disease vs. Spinal Stenosis 

Feature	Iliac Artery Disease (Vascular)	Spinal Stenosis (Neurogenic)
Pain Location	Buttock, hip, thigh	Buttock, radiating down back of leg
Trigger	Walking a set distance	Standing still or walking
Relief	Standing still (2–5 mins)	Sitting or leaning forward
Pulses	Weak or absent in the groin/foot	Usually normal
Buerger’s Test	Foot turns pale when elevated	No change in skin colour

Specialist imaging for iliac disease 

If a GP suspects iliac artery disease based on your symptoms and a weak femoral pulse in the groin, they will refer you for specialist imaging. Because the iliac arteries are deep within the pelvis, standard handheld Doppler tests (ABPI) can sometimes be less accurate than they are for the lower leg. 

Diagnostic Tools for Pelvic Vessels 

• Duplex Ultrasound: A specialist sonographer can often visualise the iliac arteries through the abdominal wall to measure flow velocity. 

• CT Angiogram (CTA): Provides a high-resolution 3D map of the pelvic vessels, clearly showing the location and length of any blockages. 

• MR Angiogram (MRA): A non-radiation alternative that uses magnetic fields to create detailed images of the arterial tree. 

Once the blockage is mapped, a vascular surgeon can decide if the patient would benefit from a minimally invasive procedure, such as placing a stent in the iliac artery to hold it open and restore blood flow. 

To Summarise 

Buttock pain when walking is a hallmark symptom of iliac artery disease, particularly if it subsides quickly with rest. This condition is caused by atherosclerosis in the pelvic arteries, which starves the gluteal muscles of oxygen during exercise. Differentiating this from nerve pain is essential for getting the correct treatment. If you experience severe, sudden, or worsening symptoms especially if accompanied by coldness or numbness in the leg call 999 immediately. 

Authority Snapshot 

The clinical relationship between buttock pain and pelvic arterial blockages described in this article is based on the ‘Peripheral arterial disease: diagnosis and management’ [CG147] guidelines from the National Institute for Health and Care Excellence (NICE). Further diagnostic context is drawn from the 2025 Global Vascular Guidelines for the management of limb-threatening ischaemia. This article was written by Dr. Rebecca Fernandez, a UK-trained physician with experience in cardiology and general surgery, and reviewed by Doctor Stefan to ensure alignment with NHS safety standards.