nails, picking at them, or undergoing frequent manicures can sometimes damage the nail matrix—the area where the nail is produced. Damage to the nail matrix can result in ridges or grooves as the nail grows.
3. Nutritional Deficiencies
Certain nutritional deficiencies can affect nail growth and appearance. In particular, inadequate iron or protein intake may contribute to nail changes in some people.
However, nail ridges alone do not necessarily mean that you have a nutritional deficiency.
4. Dryness
Dry or damaged nails can be more prone to splitting, cracking, and