How Diabetes and Heart Disease Affect Your Feet
(With advice from the American Diabetes Association and the American Heart Association)
Diabetes and heart disease are closely related conditions that often coexist. According to the American Heart Association (AHA), adults with diabetes are at significantly greater risk of developing cardiovascular disease than those without diabetes. The American Diabetes Association (ADA) even classifies cardiovascular disease as the leading cause of death among people with diabetes.
Although most people associate heart disease with chest pain and shortness of breath, early warning signs can sometimes appear much lower in the body — in the feet.
Understanding how diabetes and heart disease affect foot health is crucial to preventing serious complications.
Proven Link Between Diabetes and Cardiovascular Disease.
The ADA Standards of Care for Diabetes (2024) states that chronic hyperglycemia contributes to microvascular and macrovascular damage. This includes:
Damage to small blood vessels (microvascular complications such as neuropathy)
Damage to larger arteries (macrovascular diseases such as coronary artery disease and peripheral arterial disease)
Similarly, the AHA Scientific Statement on Cardiovascular Disease in Diabetes explains that diabetes accelerates atherosclerosis—the buildup of plaque in the arteries—increasing the risk of heart attack, stroke, and peripheral artery disease (PAD).
When blood vessels narrow or stiffen due to plaque buildup, circulation in the lower extremities decreases. The feet, being the furthest point from the heart, are particularly vulnerable.
Why feet are more vulnerable
Two main mechanisms link diabetes, heart disease, and foot complications:
- Peripheral neuropathy (ADA)
According to the American Medical Association (ADA), diabetic peripheral neuropathy is one of the most common complications of diabetes. It results from long-term high blood glucose levels, which damage nerves.
Symptoms may include:
Numbness
Tingle
Burning sensation
Limited ability to feel pain or temperature
When sensation is impaired, minor injuries may go unnoticed.
- Peripheral Arterial Disease (PAD)
The American Heart Association (AHA) identifies peripheral artery disease (PAD) as a symptom of systemic atherosclerosis. PAD reduces blood flow to the legs and feet due to narrowing of the arteries.
Reduced blood flow leads to:
Delayed wound healing
Increased risk of infection
Greater likelihood of developing ulcers
In severe cases, tissue death occurs (gangrene)
When neuropathy and PAD occur together—a common occurrence in people with diabetes—the risk of serious foot complications increases dramatically.
Warning signs on your feet that may indicate a risk of cardiovascular disease
Both the ADA and AHA emphasize the importance of early recognition of vascular and neurological symptoms.
Pay attention to:
- Cold feet or low temperature
May indicate decreased arterial blood flow.
- Swelling of the ankles or feet
According to the American Heart Association (AHA), persistent swelling may be a symptom of heart failure.
- Leg pain when walking (claudication)
The classic symptom of PAD described in the AHA guidelines is pain that improves with rest.
- Slow healing wounds
The ADA recommends immediate evaluation of any foot ulcer that does not improve within two weeks.
- Skin discoloration (pale, bluish or reddish tint)
This may be a symptom of circulatory disorders.
Compound Risk
The ADA states that people with diabetes have a significantly increased risk of lower limb amputation, especially in the case of coexisting peripheral neuropathy and PAD.
The American PAD Association further states that PAD is not just a leg condition – it is a symptom of widespread atherosclerosis and increases the risk of heart attack and stroke.
This means that foot symptoms may indicate a broader cardiovascular condition.
Guideline-Based Prevention Strategies
Both organizations provide clear recommendations for prevention.
ADA Recommendations:
Annual comprehensive foot examination
More frequent testing for high-risk patients
Daily foot self-examination
Tight glycemic control to reduce the progression of neuropathy
Immediate assessment of any ulcers or infections
AHA recommendations:
Monitor your blood pressure
Control your cholesterol levels
Maintain a healthy weight
Quit smoking
Engage in regular physical activity
These treatments reduce cardiovascular and lower body complications.
When to seek immediate medical attention
You should seek immediate medical attention if you experience any of the following symptoms:
Sudden, severe discoloration of the feet
Signs of infection (redness, fever, pus)
Rapid swelling
Chest pain with symptoms in the legs
New onset of severe leg pain
According to ADA and AHA guidelines, early intervention significantly reduces the risk of permanent damage.
Clinical Summary
The feet are often an early indicator of the overall health of the blood vessels.
The American Diabetes Association emphasizes that foot complications can be prevented with early detection and appropriate treatment.
The American Heart Association emphasizes that peripheral artery disease is a serious cardiovascular condition that should not be ignored.
When diabetes coexists with heart disease, regular foot monitoring becomes not only a recommendation, but a necessity.
Protecting your feet is part of protecting your heart.
