Calf pain when walking: the symptom too many people put down to age

Of all the symptoms that come through my clinic, this may be the one people sit on the longest: a cramping, aching pain in the calf that comes on with walking and eases with rest. Most have already explained it away — age, being unfit, “a touch of arthritis”. Some have quietly rearranged their lives around it for years — shorter walks, more taxis, the lift instead of the stairs — without ever mentioning it to a doctor.

The pattern has a medical name: intermittent claudication. And it deserves attention, because it is usually not about the muscle at all. It is about the artery supplying it.

The pattern that gives claudication away

Claudication — from the Latin word for limping — has a signature that is easy to recognise once you know it:

• The pain starts after a predictable distance. Patients can often tell me exactly: two bus stops, one loop of the void deck, the walk from the MRT station to the office.
• It sits in a muscle — most often the calf, sometimes the thigh or buttock, depending on where the artery is narrowed.
• It is relieved by simply standing still for a few minutes. No need to sit, stretch or lean on anything.
• Then it returns at roughly the same distance again.

That predictability is the giveaway. A working muscle needs several times more blood than a resting one. If the artery feeding it is narrowed by plaque — the condition we call peripheral arterial disease, or PAD — the supply copes at rest but cannot keep up with exercise. The muscle runs short of oxygen, protests with pain, and recovers the moment demand falls. It is, in a real sense, angina of the leg.

A leg symptom — but a whole-body warning

Here is the part I most want people to understand. The plaque narrowing a leg artery is not a local problem. Atherosclerosis is a disease of the whole arterial tree, and someone with claudication very often has the same process at work in the arteries of the heart and brain.

That is why international vascular guidelines treat PAD as a marker of high cardiovascular risk: people with claudication carry a substantially increased risk of heart attack and stroke compared with those who don’t have it. In many patients, the leg is simply where the disease announces itself first. Treating the leg matters — but protecting the heart and brain matters even more.

What else can cause calf pain on walking

Not every painful calf is an artery problem, which is why assessment beats assumption. The common look-alikes:

• Spinal stenosis — narrowing in the lower spine pressing on nerves. The heaviness or pain also comes on with walking, but it eases with sitting or leaning forward, not with standing still. Many patients notice they can walk much further pushing a supermarket trolley — the classic “shopping-trolley sign”, because leaning forward opens up the spinal canal.
• Venous claudication — a bursting, tight sensation that builds with walking, usually in a leg that has had a previous deep vein thrombosis. It typically needs elevation, not just a pause, to settle.
• Arthritis of the hip or knee — pain from the very first step, centred on the joint rather than the muscle, and variable from day to day rather than tied to a fixed distance.

The histories differ enough that a careful conversation usually points to the answer — and simple tests confirm it.

How I assess it

Assessment is straightforward and quick. I feel the pulses at the groin, behind the knee and at the foot. I measure the ankle-brachial pressure index, or ABPI — comparing the blood pressure at the ankle with the pressure at the arm, using ordinary cuffs and a small Doppler ultrasound probe. A healthy ratio is around 1.0; a lower figure suggests narrowed arteries, and roughly how narrowed they are.

Where the story or the ABPI points to PAD, a duplex ultrasound scan maps exactly where the narrowing sits and how severe it is. In my clinic that scan happens during the consultation, so most patients leave their first visit with a diagnosis rather than another referral letter.

Why “just getting old” is the costliest wrong answer

Put claudication down to age, and two opportunities are missed.

The first is the leg itself. A structured walking programme, medication and risk-factor control improve walking distance for many patients. Where the narrowing is severe or genuinely limits daily life, angioplasty and stenting can reopen the artery through a needle puncture in the skin — typically as a day procedure.

The second, larger opportunity is everything upstream. Diagnosing PAD is what triggers the treatment that protects the heart and brain: antiplatelet medication, a statin, blood-pressure and diabetes control, and proper support to stop smoking. That is where the greatest gains lie — and it is exactly what is lost when the symptom gets filed under ageing.

When to get checked promptly

See a doctor about calf pain if it reliably appears with walking and settles when you stand still — the earlier PAD is found, the simpler the options tend to stay. Seek attention urgently if leg pain occurs at rest or wakes you at night and eases only when you hang the foot down, if a foot wound will not heal, or if a foot turns suddenly pale, cold and painful. Those are signs the circulation is critically short — and they should never be put down to age.