It usually starts as something small enough to explain away. A cramp in the calf on the walk from the far end of the parking lot. An ache in the thigh halfway around the block that fades once you stop to check your phone. Most people chalk it up to getting older, or to being out of shape. But leg pain that shows up when you walk and disappears when you rest has a name — claudication — and it is the classic sign of peripheral artery disease (PAD). At Northwest Cardiovascular Clinic, we evaluate and treat PAD for patients across Tomball, Cypress, Spring, and northwest Houston. Here is what it is, how we test for it, and what can be done.
What peripheral artery disease actually is
PAD is the same disease process as a heart attack, just in a different location. Over years, cholesterol-rich plaque builds up inside the arteries that carry blood down into your legs, narrowing them and limiting flow. At rest your leg muscles get enough blood and feel fine. Ask them to work — walking, climbing stairs, carrying groceries — and demand outruns supply. The muscle protests, you stop, demand falls, and the pain quietly resolves. That predictable on-and-off pattern is what makes claudication so recognizable once you know to look for it.
Roughly ten million adults in the United States are living with PAD, and the number climbs steeply after age 65. It is chronically underdiagnosed, in large part because it does not always hurt: depending on the study, somewhere between 20 and 59 percent of people with objectively proven PAD have no classic claudication at all. Some have vaguer symptoms — heavy, tired legs, or simply walking more slowly than they used to — and some have nothing.
What PAD leg pain feels like
Patients describe it in a few consistent ways. Look for this combination:
- Cramping, aching, tightness, or fatigue in the muscle — most often the calf, but it can be the thigh, hip, or buttock depending on where the blockage sits.
- Brought on by walking, and typically at about the same distance each time. Hills, faster walking, and Houston’s heat and humidity all shorten that distance.
- Relieved by standing still within a few minutes — you do not have to sit down or change position.
- Reproducible. It happens again the next day at roughly the same point.
Other clues that circulation to the legs is limited include a foot that feels cold compared to the other one, toenails that thicken and grow slowly, hair loss on the shins and toes, shiny or pale skin on the lower leg, weak or absent pulses in the foot, and cuts or blisters below the knee that take a long time to heal.
What it is probably not
Leg pain is common and most of it is not arterial. A few useful distinctions:
- Vein problems tend to feel like heaviness, throbbing, or swelling that gets worse as the day goes on and better when you put your feet up. PAD does the opposite — elevating the leg can make it hurt more, and dangling it off the bed can ease it. If your legs ache and swell rather than cramp with walking, our page on leg swelling is the better starting point.
- Spinal stenosis (sometimes called pseudoclaudication) can also cause leg pain with walking, but it usually requires sitting or bending forward to relieve it, not just standing still, and it often comes with numbness or back pain.
- Arthritis hurts in the joint rather than the muscle belly, is often worst on first movement in the morning, and does not follow a reliable walking distance.
- Ordinary muscle cramps and night cramps come out of nowhere rather than being triggered by a set amount of exertion.
Who is at risk
The risk factors for PAD are largely the ones you already associate with heart disease, with one standing out:
- Smoking — by a wide margin the strongest modifiable risk factor for PAD, and the single most important thing to change.
- Diabetes, which both raises PAD risk and makes foot complications more likely.
- Age 65 and older, or age 50 to 64 with other risk factors.
- High blood pressure and high cholesterol.
- Chronic kidney disease.
- A family history of PAD, or known atherosclerosis anywhere else — if you have had a stent, a bypass, or a stroke, your leg arteries deserve a look too.
Why PAD matters beyond your legs
This is the part that surprises people. PAD is not only a leg problem — it is a marker that atherosclerosis is present in your arteries generally. People with PAD carry a substantially higher risk of heart attack and stroke than people without it, and that cardiovascular risk is usually the bigger long-term threat. Finding PAD is genuinely valuable information, because it changes how aggressively we protect the heart and brain, not just the legs.
How PAD is diagnosed
For most patients, the diagnosis is straightforward and requires no needles, dye, or radiation.
The ankle-brachial index (ABI)
The ABI is the standard first test, and it is recommended by the 2024 ACC/AHA guideline for anyone whose history or exam suggests PAD. A technician takes the blood pressure in both arms and both ankles using a cuff and a small Doppler probe, then divides the ankle pressure by the higher arm pressure. It takes about 15 minutes and is completely painless.
- 0.90 or below confirms PAD.
- 0.91 to 0.99 is borderline.
- 1.00 to 1.40 is normal.
- Above 1.40 means the arteries are too stiff to compress — common in diabetes and kidney disease — and we follow it with a toe-brachial index instead, since the small toe arteries usually stay compressible.
If your symptoms sound like claudication but your resting ABI is normal, an exercise ABI — repeating the measurement after walking on a treadmill — will often reveal a drop that the resting study missed.
Imaging, when it is needed
A duplex ultrasound can show where the narrowing is and how severe it is. CT or MR angiography is generally reserved for planning a procedure rather than making the initial diagnosis. Because our clinic performs vascular studies, an echocardiogram, and a stress test under one roof, we can usually sort out both your legs and your heart risk without sending you across town.
How PAD is treated
Treatment has two separate goals that are easy to confuse: protecting your heart and brain, and improving how far you can walk. Nearly everyone gets the first. The second is tailored to how much the symptoms are limiting you.
1. Risk-factor and medical therapy
Quitting smoking is the highest-yield step, and we will help you do it — combining counseling with medication works far better than willpower alone. Beyond that, guidelines call for high-intensity statin therapy aiming for at least a 50 percent reduction in LDL cholesterol, antiplatelet therapy such as aspirin or clopidogrel, and careful control of blood pressure and diabetes. For selected patients who are not at high bleeding risk, adding low-dose rivaroxaban (2.5 mg twice daily) to low-dose aspirin has been shown to reduce major cardiovascular and limb events. Whether that combination is right for you is a conversation about your individual bleeding risk.
2. Structured exercise — the most underrated treatment there is
It sounds like a consolation prize, and it is not. Supervised exercise therapy carries the guidelines’ strongest recommendation for people with symptomatic PAD, and in many patients it improves walking distance as much as a procedure does. The usual prescription is walking to moderate claudication pain, resting until it eases, and repeating — about 30 to 45 minutes, three times a week, for at least 12 weeks. Medicare and most insurers cover supervised exercise therapy for symptomatic PAD. A structured community- or home-based program is a recommended alternative when getting to a facility is not practical.
3. Medication specifically for claudication
Cilostazol is recommended to improve walking distance in claudication. It is not appropriate for anyone with heart failure of any severity, which is one reason a cardiologist should be the one prescribing it.
4. Procedures, when they are warranted
If claudication still limits your life after a genuine trial of exercise and medication — or if the disease has advanced to rest pain or a non-healing wound — revascularization is on the table. That may mean a minimally invasive catheter-based procedure with angioplasty and often a stent, or in some anatomies a surgical bypass. Most patients with claudication never need this, and doing it before medical therapy and exercise have had a fair trial is generally not the right sequence.
When leg symptoms are an emergency
Call 911 or go to the emergency room if a leg suddenly becomes painful, pale, cold, numb, or weak. That combination can mean acute limb ischemia — an artery that has abruptly closed — and the window to save the limb is measured in hours, not days.
Be seen within days, not months, if you have:
- Pain in the foot or toes at rest, especially at night or when lying flat, that eases when you hang your foot off the bed
- A sore, ulcer, or blister on the foot or lower leg that is not healing
- Any area of black or darkening skin on a toe or the foot
These are signs of chronic limb-threatening ischemia, the most advanced form of PAD. It is treatable, and outcomes are far better when it is caught early. If you have diabetes, check your feet daily and report anything new — reduced sensation can hide a wound until it is well established.
Small habits that help
Walk daily, even short distances, and keep walking through the mild discomfort where it is safe to do so. Keep your feet clean, moisturized, and protected in well-fitting shoes — no barefoot walking. Never use a heating pad on a leg with poor circulation or reduced sensation. Stay hydrated in the Texas heat, and take your medications consistently, including the ones that treat numbers you cannot feel, like cholesterol.
PAD evaluation in Tomball & Cypress
Northwest Cardiovascular Clinic is located just off SH 249 (Tomball Parkway) in northwest Houston, caring for patients throughout Tomball, Cypress, Spring, and the greater Houston area. Dr. Ismail Dairywala is a board-certified cardiovascular specialist, and because we evaluate the heart, the arteries, and the veins in one place, we can determine whether your leg pain is arterial, venous, or something else entirely — and start treatment without a string of referrals.
If your legs cramp when you walk and settle when you stop, do not wait it out. Contact our office to schedule an evaluation, or call (281) 807-5253. A simple 15-minute test can tell you a great deal.
Frequently asked questions
What does peripheral artery disease leg pain feel like?
Classic PAD leg pain, called claudication, is a cramping, aching, or tight, tired feeling in the calf, thigh, hip, or buttock that comes on after walking a fairly predictable distance and goes away within a few minutes of standing still. It is reproducible day to day, and hills, faster walking, and Houston's heat all shorten the distance you can cover.
How is PAD diagnosed?
The first test is the ankle-brachial index (ABI), a painless 15-minute comparison of blood pressure at your ankles and arms. An ABI of 0.90 or below confirms PAD, 0.91 to 0.99 is borderline, and above 1.40 means the arteries are too stiff to compress, in which case a toe-brachial index is used instead. If symptoms sound like claudication but the resting ABI is normal, an exercise ABI is often the next step.
Can peripheral artery disease be reversed?
The plaque itself is not usually reversed, but PAD is very treatable. Quitting smoking, high-intensity statin therapy, antiplatelet medication, blood pressure and diabetes control, and a structured walking program can substantially improve how far you walk and lower your risk of heart attack and stroke. Angioplasty, stenting, or bypass are available when symptoms remain limiting.
Is walking good or bad for PAD?
Walking is one of the most effective treatments. Supervised exercise therapy carries the strongest guideline recommendation for symptomatic PAD, and in many patients it improves walking distance about as much as a procedure. A typical program is 30 to 45 minutes, three times a week, for at least 12 weeks, walking until you feel moderate discomfort, resting until it eases, then repeating.
Is PAD leg pain dangerous?
The leg symptoms themselves are rarely an emergency, but PAD signals that atherosclerosis is present throughout your arteries, which raises your risk of heart attack and stroke. Seek care within days for foot pain at rest, a non-healing sore, or darkening skin on a toe. Call 911 if a leg suddenly becomes painful, pale, cold, numb, or weak, which can mean an artery has closed abruptly.
Where can I get tested for PAD near Tomball or Cypress?
Northwest Cardiovascular Clinic performs ankle-brachial index testing and vascular ultrasound at our office just off SH 249 in northwest Houston, serving Tomball, Cypress, Spring, and the surrounding communities. Because we assess the heart and the arteries in the same visit, most patients get answers without additional referrals. Call (281) 807-5253 to schedule.