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 disease can cause clubbing.Know More
In some cases, nail clubbing runs in families and is not associated with any health problems, notes NHS Choices. However, when a person suddenly develops nail clubbing, it can be a warning sign of diseases of the lungs and heart, such as lung cancer, endocarditis and bronchiectasis. Other health issues that nail clubbing may indicate include cirrhosis, bowel cancer, stomach cancer and polycythaemia, a condition in which the blood is thicker than normal.
Some other fingernail and toenail abnormalities that can provide clues about health are brittle and crumbly nails, loose nails, thickened nails and discolored nails, according to NHS Choices. Possible causes of brittle, crumbly nails include fungal infections, thyroid problems and the skin condition lichen planus. Loose nails can signal overactive thyroid, poor circulation, an allergic reaction to a medication or a fungal infection. Potential reasons for thickened, overgrown nails include fungal infections, reactive arthritis, or shoes that are too narrow or small. Nails that are discolored a yellowish tint may result from sinusitis, jaundice, lymphoedema or tuberculosis.Learn more about Nail Care
Fingernails normally grow at a fixed rate, but factors such as finger usage, age and injuries may cause fingernails to grow faster or slower, according to Wired. Despite some scientific research that shows fingernails grow at different rates, medical science has not determined why, notes WebMD.Full Answer >
Black fingernails may be the result of a hematoma, according to Dr. Melissa Conrad Stöppler writing on MedicineNet. A hematoma is a pool of blood under fingernails that is usually the result of some type of trauma.Full Answer >
Discolored fingernails can be a symptom of a fungal infection. There are also a few disorders that can cause nail discoloration, as noted by MedicineNet.Full Answer >
Generally, acrylic nails do not ruin natural nails, according to Mayo Clinic. However, occasionally, acrylic nails can result in an infection or an allergic reaction.Full Answer >