Vertical Stripes: Common with aging, these lines often indicate nutrient deficiencies like low vitamin B12, magnesium, or iron. If they suddenly appear, they might point to anemia or thyroid issues.

Horizontal Stripes (Beau’s Lines): Grooves across the nail could signal serious conditions like malnutrition, diabetes, or heart and lung issues. They often appear after stress or illness halts nail growth temporarily.

White Stripes (Muehrcke’s Lines): Horizontal white lines may suggest liver or kidney problems or low blood protein levels. These lines don’t indent and often affect multiple nails.

If you notice unusual changes, consult a doctor to rule out serious health concerns.