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www.reference.com/article/causes-brittle-fingernails-vertical-ridges-38409201d1968e90

Onychorrhexis is the medical diagnosis for brittle fingernails that feature vertical ridges, and the primary cause is unusual dryness within the nail. Other causes include malnutrition, endocrine disorders, skin conditions such as psoriasis, low levels of thyroid hormone and Raynaud's phenomenon, th

www.reference.com/article/fingernails-made-2b62ff5591d016a5

Fingernails are made of multiple layers of a strong material called keratin. Keratin is a protective protein produced by the body. It consists of proteins that form filaments and enzymes.

www.reference.com/article/causes-fingernail-problems-77b39cba2be37b1f

Some of the most common causes of fingernail problems and abnormalities are diseases, injury to the nail, infection, drugs and poisonous substances. These factors can contribute to fingernail problems that alter the shape, color, texture and structure of the fingernails. Among the usual fingernail p

www.reference.com/article/common-fingernail-problems-cd847ffdc9c27564

Common fingernail problems include general weakness, tearing and peeling of the nails. Cutting fingernails below the natural nail line is also a common problem that people have with their nails.

www.reference.com/article/causes-white-fingernails-2b48fae309333f5f

There are at least 45 different possible causes for white fingernails according to RightDiagnosis. These causes range from having white nails at birth, known as congenital white nails, to the more serious cause of arsenic poisoning.

www.reference.com/article/causes-brittleness-fingernails-leading-easy-splitting-frequent-clipping-jagged-edges-8db14b4cadba4b3b

Brittle fingernails are caused by trauma, overexposure to harsh solvents, recurring exposure to liquids, malnutrition or an underlying health problem, according to NYU Langone Medical Center. Brittle nails are also a normal effect of aging, according to MedlinePlus.

www.reference.com/article/remedies-thin-fingernails-23e4b45f66b5c830

Dr. Bailey Skin Care recommends applying oils and lotions to thin fingernails. Shea butter, coconut oil, olive oil and avocado oil are common hydrating ingredients that many people already have at home. It is best to apply oils and creams to wet nails so as to trap in the moisture.

www.reference.com/article/humans-fingernails-77299c8b9cd78bf

Humans have fingernails to protect sensitive skin on the fingers from cuts, burns and other damage. Nails on the fingers help people pick and pry, essentially serving as natural tools. They help with grooming by letting people brush off dirt and contaminants from skin and help people perform simple

www.reference.com/article/fingernails-grow-7b920febc9821baf

Fingernails grow from the root of the nail, pushing old cells out which flatten and harden, as new cells take their place. The flattened and hardened nail then slides along the nail bed, which is fed with minuscule blood vessels.

www.reference.com/world-view/causes-fingernails-grow-down-13f4405a0d5cb3f8

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 as low blood oxygen, inflammatory bowel disease, AIDS and cardiovascular diseas