What Your Feet Tell You About Your Health: 14 Signs to Watch For

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

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Your feet contain 26 bones, 33 joints, and over 100 muscles, tendons, and ligaments — and they’re often the first place your body shows signs of systemic disease. I’ve had patients come in for foot pain and leave with a referral to a cardiologist. Here are 14 things your feet might be trying to tell you.

1. Cold Feet (When You’re Not Cold)

What it means: Persistent cold feet — especially when one foot is colder than the other — can signal peripheral arterial disease (PAD), poor circulation, Raynaud’s phenomenon, or hypothyroidism. If rubbing your feet doesn’t warm them, see a doctor.

2. Swollen Feet and Ankles

What it means: Bilateral swelling (both feet) often indicates heart failure, kidney disease, liver problems, or venous insufficiency. Unilateral swelling can be a DVT (blood clot) — which is a medical emergency. If your feet are swollen and you have shortness of breath, go to the ER.

3. Numb or Tingling Feet

What it means: Tingling, burning, or numbness starting in the toes is the classic presentation of peripheral neuropathy. The most common cause is diabetes — and foot symptoms often appear before the diabetes diagnosis. A blood sugar test is warranted.

4. Toenail Changes

What it means: Yellow nails → fungal infection, lung disease, or lymphedema. White nails → liver disease or anemia. Spoon-shaped nails (koilonychia) → iron deficiency. Dark vertical lines under the nail → possible melanoma. Any new streak under a nail deserves a podiatry evaluation.

5. Dry, Cracked Heels

What it means: While often just from dehydration or going barefoot, persistent severe cracking can signal hypothyroidism, diabetes, or Sjögren’s syndrome. If moisturizer isn’t helping, ask your doctor for a thyroid panel.

6. Foot Pain at Night

What it means: Burning foot pain that wakes you at night — especially relieved by hanging your feet off the bed — is a classic sign of peripheral arterial disease. The feet need gravity to get blood when circulation is compromised.

7. Sudden Gout Attack

What it means: Gout (intense pain, warmth, and swelling at the big toe joint) indicates high uric acid levels. Untreated gout increases risk of kidney stones and kidney disease. It’s also often a metabolic syndrome marker.

8. Slow-Healing Wounds

What it means: Any foot sore that doesn’t heal in 1–2 weeks in a person with diabetes is a medical emergency. Poor wound healing can indicate diabetes, PAD, venous insufficiency, or immune compromise.

9. Hair Loss on Feet and Toes

What it means: Loss of hair on the feet and lower legs — combined with thin, shiny skin and cold feet — is a hallmark sign of peripheral arterial disease. The reduced blood flow affects hair follicles.

10. Pitted Toenails

What it means: Small pits or depressions in the toenails affect up to 80% of people with psoriasis and are also seen in psoriatic arthritis. Nail pitting is often dismissed as nothing — but it warrants a rheumatology evaluation.

11. Clubbing of the Toes

What it means: When the tips of the toes become bulbous and the nails curve around them, this “clubbing” indicates long-standing low oxygen — associated with heart disease, lung disease, inflammatory bowel disease, and liver cirrhosis.

12. Burning Feet Syndrome

What it means: A persistent burning sensation in the feet without numbness can indicate vitamin B12 deficiency, hypothyroidism, or the early stages of diabetic neuropathy. A simple blood panel rules out the most common causes.

13. Repeatedly Ingrown Toenails

What it means: While often mechanical (narrow shoes, improper cutting), recurring ingrown toenails in multiple toes can indicate connective tissue disorders or immune compromise. Patients on certain chemotherapy drugs also develop nail problems.

14. Dark Spots Under Toenails

What it means: A dark streak running the length of a nail can be a melanoma — and subungual melanoma (under the nail) has a significantly worse prognosis than skin melanoma because it’s caught late. Any unexplained dark spot under a nail needs a podiatry evaluation.

When to See a Doctor

Any of these signs — especially if they’re new, changing, or combined with other symptoms — warrant evaluation. At Balance Foot & Ankle, we perform comprehensive foot health assessments and can coordinate with your primary care physician when systemic disease is suspected.

What Your Feet Tell You About Your Health — Podiatrist Guide

Your feet can reveal hidden health problems. Our podiatrists perform comprehensive foot exams that can detect signs of diabetes, circulation issues, and systemic conditions.

Schedule Your Comprehensive Foot Assessment → | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Baran R, et al. Nail changes as signs of systemic diseases. Seminars in Cutaneous Medicine and Surgery, 2009;28(1):41-46.
2. Boulton AJ, et al. Comprehensive foot examination and risk assessment. Diabetes Care, 2008;31(8):1679-1685.
3. Dunn JE, et al. Prevalence of foot and ankle conditions. American Journal of Epidemiology, 2004;159(5):491-498.

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Dr. Tom Biernacki, DPM

Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.