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Onycholysis is often caused by skin diseases like psoriasis. When the skin becomes inflamed or swollen beneath the nail, the nail lifts off. When your doctor is diagnosing onycholysis, he or she may take a sample of the skin below the nail to test for skin disease, although many, like psoriasis, are diagnosed by visual inspection.
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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.