Striped nails—characterized by vertical ridges or horizontal lines—can serve as subtle indicators of your overall health. While some variations are harmless, others may point to nutritional deficiencies, stress, or underlying medical conditions.

Vertical Ridges (Longitudinal Lines)

Vertical ridges, also known as longitudinal lines, often become more visible with age due to decreased keratin production. However, they can also result from dehydration, nutritional deficiencies (notably iron, zinc, and vitamin B12), and certain skin conditions like psoriasis. Additionally, autoimmune disorders such as rheumatoid arthritis, which affect joints, including those in the hands and feet, might cause vertical ridges in nails. This is because such conditions are usually associated with inflammation, which interrupts normal nail growth.

Horizontal Ridges (Beau’s Lines)

Horizontal ridges, or Beau’s lines, are deep horizontal grooves that traverse the nail plate. They can emerge after a significant disruption in nail growth due to factors like severe illness, high fever, or malnutrition. Conditions such as diabetes, heart disease, or kidney disease have also been linked to the appearance of Beau’s lines. Additionally, trauma to the nail matrix or side effects from chemotherapy can result in these horizontal ridges.

When to Seek Medical Advice

If you observe sudden or pronounced changes in your nails, it’s advisable to consult a healthcare provider. Persistent vertical ridges may indicate nutritional deficiencies, while horizontal lines could suggest more serious health concerns. Maintaining a balanced diet, staying hydrated, managing stress, and practicing good nail care can help prevent or minimize these nail abnormalities.