Your feet can reveal warning signs of deeper health problems, including diabetes, thyroid disease, heart issues, or poor circulation. Doctors stress that “symptoms affecting your feet can reflect serious issues.”

Spoon-shaped nails (koilonychia) curve upward and may hold a drop of liquid. This often points to iron-deficiency anemia, since “iron plays a vital role in carrying oxygen throughout the body.” If combined with fatigue or pale skin, medical advice is needed. In rarer cases, spoon nails may be linked to heart disease or hemochromatosis, where the body absorbs too much iron.

Yellow or thickened toenails often mean fungal infection, but they can also be tied to psoriasis or thyroid disease. Those with weak immune systems, including people with HIV or diabetes, are more at risk. Experts warn that “persistent nail changes often suggest chronic issues” needing antifungal or systemic treatment.

Yellow nail syndrome, in particular, can be a red flag for lymphedema or even respiratory disorders.

In short, foot changes shouldn’t be ignored. Your nails and skin can act as early signals for hidden health conditions, making regular attention to your feet an important part of overall well-being.