Our expert says:
The medical term for this is Onychoschizia. It is sometimes caused by loss of natural oils of the fingernail when working with harsh cleaning agents, or with repeating wetting and drying of the nail. Cutex removers can also be a culprit. Medical causes can be iron shortage but rarely is a vitamin shortage the cause, although Biotin vitamin supplement may help. Try using a cuticle oil and wearing plastic gloves when working in water.
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