In Maine, it's easy to blame the weather. But cold feet that persist indoors — especially when one foot feels colder than the other — may be a circulation signal worth taking seriously.
If your feet are always cold — even in a warm room, even under blankets — that's your body signaling that blood may not be reaching your lower extremities the way it should. Maine winters give everyone an excuse to dismiss it. But persistent coldness indoors, or one foot noticeably colder than the other, is a different category entirely. That asymmetry is one of the most reliable clinical signs of peripheral arterial disease.
30-MINUTE SCAN MAPS WHERE BLOOD FLOW IS RESTRICTED
If your feet are always cold — especially if one foot is colder than the other — that's a circulation signal. An arterial ultrasound takes 30 minutes at home and maps exactly where blood flow may be restricted. No referral required. Same week in Southern Maine.
If you notice sudden, severe coldness in a limb combined with pain, pallor, or numbness that came on rapidly — seek emergency care immediately. Acute limb ischemia is a time-sensitive emergency.
Cold feet are a symptom. These are the conditions most commonly behind it:
PAD occurs when the arteries supplying the legs and feet become narrowed by plaque buildup — the same process that causes heart attacks and strokes, just in a different location. With reduced arterial flow, the feet and lower legs receive less warm, oxygenated blood. The result is persistent coldness, especially in the toes and feet, often accompanied by skin color changes, slow-healing wounds, or hair loss on the lower legs. A peripheral arterial duplex ultrasound can help determine where flow is restricted and how severely.
Raynaud's is a condition where small blood vessels in the fingers and toes overreact to cold or stress, causing them to temporarily narrow (vasospasm). During an episode, affected digits can turn white, then blue, then red as circulation returns — often with tingling or throbbing. It's more common in women and often bilateral. While Raynaud's itself is not typically dangerous, it can coexist with connective tissue diseases. An arterial study helps rule out a fixed arterial obstruction as the cause of coldness.
Diabetes accelerates arterial disease in ways that disproportionately affect the smaller vessels of the feet and lower legs. People with diabetes are significantly more likely to develop PAD — and are more likely to have it silently, without the classic claudication (walking pain) that often prompts evaluation in non-diabetic patients. Cold feet in a person with diabetes warrant arterial assessment to establish a baseline and catch disease before it progresses to ulceration or tissue loss.
Cold feet can absolutely result from Maine's climate, poor insulation, or reduced physical activity in winter. This is the most common explanation — but it's a diagnosis of exclusion. The key distinguishing factor: bilateral coldness that resolves with warming is likely benign. Unilateral coldness (one foot colder than the other), coldness that persists even when your core is warm, or coldness paired with skin changes or wounds that won't heal — those are the patterns that warrant arterial evaluation.
One study can map the arterial circulation of both legs in a single visit:
Peripheral Arterial Duplex · $397
Duplex ultrasound of the leg arteries measures blood flow velocity at multiple points from groin to ankle. It can identify areas of narrowing, significant plaque, or reduced pulsatility that indicate compromised circulation. Unlike an ABI (ankle-brachial index) alone, duplex imaging pinpoints the location and severity of any lesions found. Completely painless, no radiation, performed at your home in approximately 30–45 minutes.
Learn about arterial duplex ultrasound →Traditional Path
BlackPoint Diagnostics
PAD is a progressive disease. Catching and documenting it early enables intervention before it reaches critical limb ischemia — a stage that carries serious risks. Maine winters provide the perfect cover for dismissing this symptom year after year.
Emanuel Papadakis, RDCS, RVT, comes to your home with hospital-grade portable ultrasound equipment. There is nothing special to do beforehand — no fasting, no preparation, no travel.
For the peripheral arterial duplex, you lie comfortably while a small amount of ultrasound gel is applied to the leg. The transducer is moved from the groin down through the thigh, knee, calf, and ankle arteries — evaluating blood flow velocity and waveform characteristics at each level. The scan takes approximately 30–45 minutes per leg studied.
The study is completely painless and uses no radiation. You'll receive a verbal summary of key findings before Emanuel leaves, with a full written report delivered within 24–48 hours.
If the arterial study is normal, that result is also valuable — it directs attention toward other explanations for your symptoms, such as Raynaud's or neuropathy, and gives your primary care physician a clear starting point for next steps.
Persistently cold feet indoors — when the rest of your body is warm — can indicate that arterial blood flow to the lower extremities is reduced. Conditions like peripheral arterial disease, Raynaud's phenomenon, and diabetes-related vascular changes can all limit circulation. An arterial duplex ultrasound can help determine whether restricted blood flow is the underlying cause.
Yes. Asymmetric coldness — one foot or leg noticeably colder than the other — is more clinically significant than bilateral coldness. It can indicate a localized arterial blockage or stenosis on that side and warrants evaluation. Bilateral coldness that resolves with warming is more likely benign but can still indicate vascular disease if it's persistent.
A peripheral arterial duplex ultrasound measures blood flow velocity through the arteries of the legs from groin to ankle. It identifies areas of narrowing, blockage, or abnormal flow. The study takes 30–45 minutes, is completely painless, uses no radiation, and is performed at your home by Emanuel Papadakis, RDCS, RVT.
No referral is required. You can book directly online and we come to your home in Southern Maine. Results are available within 24–48 hours and can be shared with your primary care physician or vascular specialist if desired.
Southern Maine · Mobile Service · No Referral
A 30-minute arterial ultrasound at your home can map your circulation and tell you whether blood flow restriction is behind your cold feet — this week, no referral needed.
Book Your Arterial ScanPeripheral Arterial Duplex $397 · No Referral · Southern Maine
Vascular Symptom
Numbness in Toes
Persistent toe numbness may be vascular or neurological — ultrasound rules out circulation.
Vascular Symptom
Leg Pain When Walking
Pain that eases with rest may indicate arterial disease (claudication).
Vascular Symptom
Swollen Ankles at Night
Evening swelling can signal venous insufficiency or heart failure.