One of the most frequent reasons for nail ridges is simply aging.
As people get older:
- Nail growth slows down
- Moisture in the nail plate decreases
- Texture becomes slightly uneven
Vertical ridges especially are very common after age 30–40 and increase with age.
2. Dehydration or dryness
Dry nails can develop more visible lines.
This can happen due to:
- Frequent hand washing
- Harsh soaps or chemicals
- Cold weather
- Lack of moisture
In many cases, moisturizing nails and cuticles improves their appearance.
3. Nutritional deficiencies (in some cases)
Sometimes nail changes can be linked to low levels of:
- Iron
- Zinc
- Vitamin B12
- Protein
However, this is usually accompanied by other symptoms—not just nail lines alone.
4. Temporary stress on the body (Beau’s lines)
Horizontal lines may appear after:
- High fever
- Major illness
- Severe stress
- Surgery or trauma
These lines show that nail growth was temporarily interrupted, then resumed.