White lines on nails, or leukonychia, are often harmless, resulting from minor injuries. However, specific patterns like Muehrcke's or Mees' lines may indicate underlying health issues such as kidney or liver disease, nutritional deficiencies, or heavy metal poisoning. Recognising these patterns and maintaining good nail care is crucial for identifying potential health concerns and ensuring overall well-being.White lines on nails, or leukonychia, are often harmless, resulting from minor injuries. However, specific patterns like Muehrcke's or Mees' lines may indicate underlying health issues such as kidney or liver disease, nutritional deficiencies, or heavy metal poisoning. Recognising these patterns and maintaining good nail care is crucial for identifying potential health concerns and ensuring overall well-being.