Slide show: 7 fingernail problems not to ignore
Photo of nail separation
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With a condition known as onycholysis, the fingernails become loose and can separate from the nail bed. Sometimes detached nails are associated with injury or infection. In other cases nail separation is a reaction to a particular drug or consumer product, such as nail hardeners or adhesives. Thyroid disease and psoriasis — a condition characterized by scaly patches on the skin — also can cause nail separation.

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