According to the Toronto Star, fingernails that curve downward are sometimes called clubbed nails, a condition which is either congenital or a symptom of a developing condition, such as respiratory disease. Wikipedia not... More »

Fingernails curling is sometimes a result of the aging process, the way the minerals form once off of the nail bed, but sometimes it can be an indicator of lung problems. Sometimes fingernails curl under as a result of "... More »

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Curling down of the toes, known as claw toe, is due to abnormal bends at the joints in the foot which cause the toes to form an unusual position. Such toes may look odd and a person may experience some pain. The conditio... More »

Fingernails can grow downward as a result of a condition called nail clubbing in which the fingers grow larger, while the nails grow around and curve over the larger fingertips, explains Mayo Clinic. Health problems such... More »

According to Dr. Standley, flat nails can indicate Raynaud's Disease, a condition characterized by cold fingers and toes. Flat nails can also be caused by an iron, protein or vitamin B12 deficiency, psoriasis or diabetes... More »

Nails that curve downward, a condition known as nail clubbing, indicate that there could be an underlying health condition. Most often, these issues involve diseases of the lung and cardiovascular system. Nail clubbing m... More »

Fingernails curling is sometimes a result of the aging process, the way the minerals form once off of the nail bed, but sometimes it can be an indicator of lung problems. Sometimes fingernails curl under as a result of "... More »

www.reference.com Beauty & Fashion Nail Care