Fingernails that split vertically are fairly common, yet typically caused by age as the cells turnover within the nail, explains Mayo Clinic. Nails that are split but also dry and brittle with cracks could be an indicati... More »

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The primary reason for nails developing longitudinal ridges or splitting vertically is age, according to Mayo Clinic. These ridges that extend from the nail bed to the nail tip are generally harmless. More »

If the nails are brittle or have splits or jagged edges along with vertical ridges, it may indicate onychorrhexis, notes WebMD. Onychorrhexis often results as a side effect of lichen planus, a skin rash. It can also indi... More »

www.reference.com Health Pain & Symptoms

Nail clubbing, nail pitting and Beau's lines are some conditions that cause bumps on fingernails, explains Mayo Clinic. Nail clubbing is when the nail convexes to create a single, large bump in the center. The condition ... More »

Remedies for split fingernails include keeping nails clipped, using lotion after washing hands, using mild soaps, wearing gloves when necessary and avoiding the overuse of nail polish remover, notes How Stuff Works. It c... More »

The primary reason for nails developing longitudinal ridges or splitting vertically is age, according to Mayo Clinic. These ridges that extend from the nail bed to the nail tip are generally harmless. More »

Thyroid issues do not cause ridges on the nails, but these issues might cause the nails to become brittle or split from the nail bed, according to MedlinePlus. Conditions such as anemia, injury and arsenic poisoning may ... More »