A split nail (onychoschizia) is a vertical or horizontal crack through the fingernail. The nail may also feel soft, thin, or brittle. Injury, harsh chemicals, psoriasis, nail fungus, or vitamin ...

Do your nails often crack and split? Do they appear "dull" and brittle? You might even feel embarrassed about their appearance or worry that they are brittle due to an underlying health condition.

Splitting and peeling nails, sometimes called onychoschizia, typically occur when the nails are weak or brittle. Nail peeling is often the result of aging, physical trauma, exposure to harsh ...