1 Calcium and vitamin D intake. 2  A diet low in calcium and vitamin D makes you more prone to bone loss. 3  Medication use. 4  Some medicines increase the risk of osteoporosis. 5  Activity level. 6  Lack of exercise or long-term bed rest can cause weak bones. 7  Smoking.
Signs and Symptoms. 1  Nail splitting affects the fingernails and the toenails. The condition may appear as a single horizontal split between layers of the nail plate at the growing end or as multiple splits and loosening of the growing edge of the nail plate.
Once nails come out from under the cuticle, they're dead tissue, so there's no way to repair it, Robinson says. Detergents and dish soap can make the nails dry and split. Wear cotton-lined rubber gloves around any soaps or cleansers, even if you're only washing one dish or one window..