Swelling in the feet and ankles, known as edema, is a common sign of cardiovascular strain. When the heart struggles to pump efficiently, blood can back up in the veins, causing fluid to leak into surrounding tissue. Tight shoes, sock indentations, shiny skin, or swelling that worsens by day’s end should not be ignored—especially when no clear cause is present.

Changes in foot color or sensation can also signal circulation problems. Bluish, purplish, pale, or blotchy skin may indicate reduced oxygen delivery, while persistent numbness, tingling, or burning sensations can point to peripheral artery disease (PAD). PAD shares the same underlying causes as heart disease and stroke, making these symptoms an important warning sign.

Slow-healing cuts, sores, or blisters on the feet are especially concerning. Proper healing requires healthy blood flow, and when circulation is compromised, even minor wounds can become serious. Pain or cramping in the legs or feet during walking that improves with rest—called claudication—is another classic sign of PAD and suggests widespread vascular disease.

These foot symptoms do not mean a heart attack is imminent, but they can serve as early alerts of cardiovascular problems developing quietly over time. Persistent swelling, color changes, numbness, pain with walking, or delayed healing should prompt medical evaluation. Paying attention early can protect both your circulation and your heart, reducing the risk of serious complications later.