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How does onychoschizia affect the body?

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
Onychoschizia, or nail splitting, doesn’t usually pose any health threat to the rest of the body. The most common cause of onychoschizia is frequent wetting and drying of the nails. But like many nail symptoms, onychoschizia can be a clue to a larger problem. If onychoschizia occurs in both the toenails and the fingernails, the cause is more likely due to a medical issue, such as a hormonal condition or nutrient deficiency. Certain medications, including those derived from vitamin A, may cause onychoschizia in some people. If all of your nails are brittle and splitting, talk with your doctor.
Onychoschizia typically only affects the fingernails. The fingernail can split both vertically and horizontally and is commonly associated with continuous wetting and drying of fingernails. However, onychoschizia can also be caused by some medications like retinoids and unusual diseases like lichen planus and polycythemia vera.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.