Horizontal ridges, also known as Beau’s lines, are less common and can be more concerning. These ridges can indicate a disruption in the growth of the nail. Causes of Beau’s lines include serious illnesses, malnutrition, or chemotherapy. If you notice horizontal ridges on your nails, it may be a sign of a more significant health issue, and it’s advisable to consult a healthcare professional.
Nutrient deficiencies can also contribute to the formation of ridges on your nails. For instance, a lack of B vitamins, especially biotin, can lead to brittle nails with ridges. Similarly, deficiencies in zinc, iron, or protein can also cause nail abnormalities. Ensuring a balanced diet rich in these nutrients can help maintain healthy nails.
Underlying health conditions such as thyroid disorders, diabetes, or skin conditions like eczema can also cause ridges to form on your nails. In some cases, ridges may be the first visible sign of these health issues. If you have concerns about changes in your nails, it’s important to seek medical advice for proper diagnosis and treatment.

While ridges on nails are often harmless and a natural part of aging, they can sometimes indicate a more serious health issue. Paying attention to the appearance of your nails and seeking medical advice when needed can help you maintain both your nails and overall health.