- Liver disease
- Diabetes
- Heart problems
If you also have symptoms like yellowing of the skin, tiredness, or loss of appetite, see a doctor right away.

Yellow Nails: More Than Just a Fungal Infection
Yellow nails are often caused by fungus, but they can also point to:
- Thyroid problems
- Diabetes
- Psoriasis
- Lung disease
If your nails are yellow and you don’t use nail polish — or you don’t have a fungal infection — talk to your doctor to find the cause.

Pay Attention — Your Nails Are Trying to Help You
Most nail changes are harmless, but when something looks unusual or lasts a long time, it’s worth checking. Your nails can reveal important clues about your health long before you notice other symptoms.