Our fingernails are composed of laminated layers of a protein called keratin which grows from the area at the base of the nail under the cuticle. Healthy fingernails are smooth, without pits or grooves. They’re uniform in colour and consistency and free of spots or discoloration.

Sometimes fingernails develop harmless vertical ridges that run from the cuticle to the tip of the nail. Vertical ridges tend to become more prominent with age. Fingernails can also develop white lines or spots due to injury, but these eventually grow out with the nail.

Not all nail conditions are normal, however. Consult your doctor or dermatologist if you notice:
• Changes in nail colour, such as discoloration of the entire nail or a dark streak under the nail
• Changes in nail shape, such as curled nails
• Thinning or thickening of the nails
• Separation of the nail from the surrounding skin... Read more at https://www.virtuedigest.com/great-tips-for-great-looking-nails/