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.
The most common areas are the inner wrists, the forearms and the ankles. Lichen planus may also affect the scalp, the nails or inside of the mouth. On the scalp, lichen planus may cause hair loss. Lichen planus of the nails can cause brittle or split nails.In the mouth, it looks like lacy white patches on the inside area of the cheeks.Sometimes lichen planus affects areas of skin where you had a cut or burn.he most common areas are the inner wrists, the forearms and the ankles. Lichen planus may also affect the scalp, the nails or inside of the mouth. On the scalp, lichen planus may cause hair loss. Lichen planus of the nails can cause brittle or split nails.