Often overlooked, your feet can be the first sign of more serious health problems. Medical experts point out that symptoms affecting your feet can reflect serious conditions like diabetes, heart disease, thyroid disorders, or poor circulation. In this article, we’ll examine the scientifically proven signs that can appear on your feet and their impact on your overall health.

Changes in nail color and shape

Spoon-shaped nails

Spoon-shaped nails (koilonychia) curve upward and may contain a drop of fluid. This abnormality is often associated with iron deficiency anemia. Low iron levels disrupt nail growth and structure. If accompanied by fatigue and pallor, it’s time to see a doctor. In rare cases, it’s also a sign of heart disease or hemochromatosis (excessive iron accumulation).

Yellowed or thickened nails

Thick, yellow nails usually indicate a fungal infection, but they can also signal psoriasis or thyroid disorders. People with weakened immune systems (HIV, diabetes) are particularly vulnerable. Persistent changes are treated with antifungals or systemic agents. In yellow nail syndrome, this condition is also associated with lymphedema or respiratory problems.

Dark streaks under the nail

A dark line under the nail without trauma could be subungual melanoma, a rare but serious form of skin cancer. Any dark or changing line should be examined immediately. A dermatologist will perform a biopsy if malignancy is suspected.

Skin and color changes

Constantly cold feet

Chronic cold feet may indicate peripheral arterial disease (PAD), hypothyroidism, or circulatory problems. PA narrows the arteries, reducing blood flow to the extremities. People over 50, smokers, and diabetics are most at risk.