Peripheral arterial disease (PAD) is a narrowing of the arteries that supply blood to the legs and feet. As the arteries narrow, less oxygen and fewer nutrients reach the tissues, which produces leg pain on walking, cold or pale feet, and wounds that heal slowly or not at all. PAD is closely linked to the same underlying conditions that cause heart disease: diabetes, high blood pressure, high cholesterol, and smoking. In Singapore, where the National Population Health Survey 2024 reports that 9.1% of residents aged 18 to 74 have diabetes (external link, opens in new tab), PAD is a major contributor to foot complications and to lower limb amputation.
PAD is not a podiatry-led condition. The specialty that diagnoses and treats the arterial narrowing itself is vascular surgery, supported by interventional radiology where endovascular procedures are needed. Podiatry sits on the foot side: screening for early circulation changes, looking after wounds in feet with poor blood supply, advising on footwear and pressure offloading, and coordinating referrals when blood flow needs to be restored. Patients seen at Straits Podiatry with suspected PAD are referred onward for vascular assessment, and Straits Podiatry continues care alongside the vascular team.
Symptoms of Peripheral Arterial Disease
- Cramping or aching pain in the calf, thigh, or buttock that comes on with walking and eases with rest (intermittent claudication)
- Coldness in one foot or leg compared to the other
- Pale, dusky, or purplish skin colour in the foot
- Reduced or absent hair growth on the lower leg
- Thin, shiny skin over the lower leg
- Toenails that grow more slowly or thicken
- Wounds or ulcers on the foot or lower leg that do not heal
- Pain in the foot at rest, particularly at night, in advanced PAD
Pain at rest, a cold pale foot, or a non-healing wound are signs of more severe disease and need prompt assessment rather than a routine appointment.
Causes of Peripheral Arterial Disease
What Causes Peripheral Arterial Disease
PAD is almost always caused by atherosclerosis: fatty plaque builds up inside the artery wall, narrowing the channel and reducing blood flow. The same process drives coronary artery disease and stroke risk, which is why PAD is treated as a marker of broader cardiovascular risk rather than just a leg problem. Diabetes accelerates the process, particularly in the smaller arteries below the knee. Smoking is the single strongest modifiable risk factor. Less commonly, blood vessel inflammation, blood clots, or certain inherited conditions can produce a similar picture.
Who Carries a Higher Baseline Risk?
- People with diabetes, particularly long-standing or poorly controlled
- People who smoke or have smoked
- People with high blood pressure
- People with high cholesterol
- People with chronic kidney disease
- People with a personal history of heart disease or stroke
- People with a family history of vascular disease
- People over the age of 60
Conditions Commonly Mistaken for Peripheral Arterial Disease
Calf pain on walking is not always PAD. Several other conditions produce activity-related or aching leg pain, and telling them apart matters because their treatment is entirely different. Where the clinical picture is unclear, non-invasive vascular testing (ankle-brachial index, doppler ultrasound) helps separate PAD from the alternatives, and the threshold for testing is lower in patients with diabetes or other vascular risk factors.
Lumbar spine nerve compression
Narrowing of the spinal canal in the lower back can compress the nerves and cause leg pain, heaviness, or cramping that comes on with walking, a pattern sometimes called neurogenic claudication. The distinguishing feature from PAD is that the pain typically eases with sitting or leaning forward rather than simply standing still, and it is often linked to back symptoms. Pulses in the feet are usually normal, which points away from a circulation problem.
Venous disease
Venous disease results from poorly functioning leg veins rather than narrowed arteries, and it produces aching, heaviness, and swelling that is usually worse at the end of the day and eases with elevation. This is the opposite of PAD, where symptoms are brought on by activity and the legs may feel better hanging down. Visible varicose veins, skin staining around the ankle, and swelling point towards a venous rather than an arterial cause.
Musculoskeletal leg pain
Muscle and tendon problems such as a calf strain or tendinopathy can also produce activity-related leg pain that is mistaken for poor circulation. The clue is that the pain is usually tied to a specific movement or a recent increase in activity, is tender to touch over the affected muscle or tendon, and does not follow the predictable stop-start pattern of vascular claudication. Foot pulses remain normal in these cases.
Treating and Preventing Peripheral Arterial Disease
PAD treatment runs on two levels: addressing the underlying disease, and protecting the foot from the consequences of reduced blood flow.
The vascular and medical side is led by the patient’s family doctor and vascular surgeon. Risk factor management covers stopping smoking, controlling blood pressure, controlling cholesterol, and tightening blood sugar control if diabetes is present. Medications prescribed by the medical team may include antiplatelets, statins, and blood pressure medication. Structured walking exercise improves walking distance in many patients with intermittent claudication. Revascularisation procedures such as angioplasty, stenting, or bypass are considered by vascular surgery when symptoms are severe, when a wound is not healing, or when limb viability is at risk.
The foot care side is where podiatry sits. A foot with reduced blood flow is at high risk of diabetic foot ulcer formation, infection, and slow healing. Podiatric care includes regular skin and nail care to prevent small skin breaks, properly fitted footwear, custom orthotics where pressure distribution is uneven, wound care if an ulcer develops, and early referral to vascular surgery if circulation deteriorates. Prevention overlaps heavily with general cardiovascular prevention: not smoking, controlling sugar and blood pressure, staying active, and attending regular foot screening if diabetes is present.
Have Your Peripheral Arterial Disease Managed at Straits Podiatry
Straits Podiatry’s role in PAD is the foot care and screening side of vascular-led management. Care includes diabetic foot screening with vascular and neurological assessment, regular skin and nail care to prevent wounds, wound and ulcer management with appropriate offloading where reduced blood flow is delaying healing, footwear advice and custom orthotics, and timely referral to vascular surgery when arterial flow needs to be restored. Straits Podiatry works alongside your family doctor, endocrinologist, and vascular surgeon as part of an ongoing review schedule matched to your individual risk.
Speak with Straits Podiatry or book a consultation for an assessment and a tailored approach to manage your peripheral arterial disease.
Frequently Asked Questions About Peripheral Arterial Disease
Do I need to see a vascular surgeon or a podiatrist for PAD?
For the arterial disease itself, vascular surgery leads. They diagnose the severity, decide whether revascularisation is needed, and perform the procedures (angioplasty, stenting, bypass) that restore blood flow when required. Podiatry sits alongside that, looking after the foot: screening for early circulation changes, treating skin and nail conditions before they become wounds, managing any ulcer that develops, and coordinating onward referral when vascular intervention is needed. Most patients with PAD benefit from both, particularly if they also have diabetes.
Will treating my PAD reverse the damage to my arteries?
Established atherosclerotic narrowing does not reverse with medication, but treatment slows or stops further narrowing and reduces the risk of major events. Stopping smoking, controlling cholesterol, controlling blood pressure, and tightening blood sugar control all change the trajectory of the disease. Revascularisation procedures open up specific narrowed segments to restore blood flow, but the underlying disease process needs to be managed long-term to keep the result. The foot care side runs in parallel: even after a successful revascularisation, a foot that has been through PAD remains at higher risk and benefits from ongoing review.
Is leg pain when I walk always PAD?
No. Calf or thigh pain on walking can come from lumbar spine nerve compression, venous disease, calf muscle strain, or tendinopathy as well. PAD pain typically comes on after a predictable walking distance, settles within a few minutes of stopping, and is felt as a cramping or aching in the calf or thigh. Pain that is worse standing still and eased by leaning forward is more typical of spine-related pain. Where the picture is unclear, non-invasive vascular testing helps separate PAD from the alternatives. Diabetes lowers the threshold for testing because PAD is more common and often less symptomatic in this group.
What happens if PAD is left untreated?
Untreated PAD tends to progress. Mild claudication can develop into pain at rest, then into non-healing wounds, then into tissue death (gangrene) where blood flow is no longer enough to keep tissue alive. The risk of major lower limb amputation rises significantly once a wound has formed in a foot with severe PAD. PAD is also a marker of disease elsewhere: untreated, the patient is at higher risk of heart attack and stroke from the same underlying atherosclerosis. Early diagnosis and treatment, including aggressive risk factor management, change that trajectory.
How often should I have my feet checked if I have PAD?
The interval is set by individual risk. Patients with PAD and diabetes, diabetic peripheral neuropathy, a previous wound, or significant deformity may be reviewed every few months. Patients with mild PAD and no other risk features may be reviewed once or twice a year. The reasoning is that a foot with reduced blood flow has a shorter window between a small skin break and a serious infection. Regular review picks up early changes (a callus pattern that is shifting, a quiet skin crack, a colour change in a toe) at a stage where they are still easy to address.