What does the half moon at the base of the nails mean?

When should you consult without delay?

If the lunula suddenly changes color, disappears completely, or becomes unusually deformed—especially if accompanied by signs such as intense fatigue, brittle nails, pale skin, or difficulty breathing—it’s best to talk to a professional. The doctor may suggest a simple blood test to assess the condition.

People suffering from endocrine disorders, heart problems or diabetes also have every interest in incorporating nail monitoring into their regular monitoring.

Finally, in case of persistent doubt, dermatologists and podiatrists are perfectly trained to examine nails in a global, preventive and non-alarmist approach.

In short, the lunula is no substitute for a blood test, but it can provide some clues. The key is to observe it over time, without becoming alarmed by the slightest change. And if it seems to be telling you something, take the time to listen… calmly.