What Causes Fingernails to Curve down?

Answer

Curved fingernails which is also known as nail clubbing are primarily caused by heart and lung problems and diseases. Some diseases that can cause curved fingernails are gastrointestinal disease, hypothyroidism, thyroid cancer, and skin diseases.
Reference:
1 Additional Answer
Curved fingernails are characterised by the curving down of the tip of the nail. The condition is mostly caused by lung diseases, heart diseases, gastrointestinal disease, thyroid cancer or skin disease.
Q&A Related to "What Causes Fingernails to Curve down?"
It's got to be hormones. After each pregnacy, mine got worse. And I can't find any other answer that makes sense!
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Go to WebMD I heard about this relating to a mineral deficency but I would hate to tell you incorrectly. Also look at the "moons" in the nails to check their color. An odd
http://answers.yahoo.com/question/index?qid=200810...
Ridges in your nails can be a sign of a
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The white marks on fingernails can indicate a lack of zinc in your diet, but generally there are a number of causes, most minor. http://www.webmd.com/content/article/42/… There
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Explore this Topic
There are several different health related causes for fingernails growing downward. Lung disease, thyroid cancer and heart disease could cause fingernails to curve ...
There are a number of things can cause fingernails to curve. One of them is trauma such as a stubbed toe or recurring injury as a result of rubbing or kicking. ...
It's got to be hormones. After each pregnacy, mine got worse. And I can't find any other answer that makes sense! ...
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