Most of us rarely think about our feet unless we’re indulging in a massage or pedicure. However, feet can offer surprising insights into our overall health, particularly when it comes to swelling or changes in appearance. Swollen feet may point to heart failure, as poor heart function can cause fluid buildup in the lower limbs. Similarly, kidney issues can result in fluid retention, which often manifests in the legs and feet. Liver diseases like cirrhosis can also disrupt the body’s fluid balance, leading to ankle and foot swelling. Chronic swelling may be linked to venous insufficiency, where veins struggle to return blood to the heart, or to lymphatic system disorders like lymphedema, caused by blocked or damaged lymph nodes.

In addition to systemic conditions, localized issues can also trigger foot swelling. Infections such as cellulitis typically cause one foot to become red, painful, and swollen, requiring immediate medical attention. Some medications—like steroids, antidepressants, and blood pressure drugs—list fluid retention as a side effect. Swelling is also common during pregnancy, especially in the third trimester, though sudden or severe swelling could signal preeclampsia and warrants urgent evaluation. Whether the cause is minor or serious, unusual foot swelling is a signal that something may be off in your body. Paying attention to these signs and consulting a healthcare provider when necessary can help catch underlying health issues early. Your feet might be more informative than you think.