Vitamin deficiencies (B12, zinc, magnesium)
Thyroid disorders
Poor circulation
When ridges are accompanied by brittle or splitting nails, it may indicate a nutritional imbalance.
2. Horizontal Lines on Nails (Beau’s Lines)
Horizontal grooves that run across the nail are called Beau’s lines. Unlike vertical ridges, these may indicate that nail growth was temporarily interrupted.
Possible causes include
Severe illness with high fever
Viral infections
Diabetes
Zinc deficiency
Chemotherapy treatments
Major stress on the body
Injury to the nail matrix
Because nails grow slowly, these lines may appear weeks or even months after the illness occurred.
3. Deep Grooves or Multiple Nail Lines
If your nails develop deep grooves, cracks, or ridges across several nails, it may be a sign that the body experienced a period of stress or nutritional imbalance.
Possible contributing factors include:
Protein deficiency
Digestive disorders that limit nutrient absorption
Chronic dehydration
Autoimmune conditions
These issues can interfere with the nail growth process, leaving visible marks.
4. Nail Lines with Color Changes
When nail lines appear along with color changes, they may require medical attention.
Some warning signs include:
