Split fingernails, known as onychoschizia or lamellar dystrophy, are caused by frequent wetting and drying of the hands, exposure to cosmetics and chemicals, injury or malnutrition. According to Skinsight, people whose professions require them to wash and dry their hands frequently are at greater risk of developing onychoschizia. When combined with longitudinal splitting of the nail, the condition can be referred to as brittle nail syndrome.Know More
Although split fingernails can be unsightly, Skinsight considers them largely a cosmetic issue. The only oral treatment for split fingernails is a biotin supplement. In order to prevent split fingernails, recommendations include wearing thin gloves when doing housework, avoiding wetting the hands, keeping the nails as dry as possible and applying petroleum jelly in order to increase nail hydration. Hardening agents should be used with caution and applied only to the growing edge of the nail because they cause brittleness.
In some cases, nail splitting can be a symptom of skin diseases such as psoriasis or lichen planus or a side effect of a medication containing vitamin A. Caring.com also warns that brittle nails can result from a lack of moisture being delivered to the nails, signaling the disruption of metabolic functions as a result of thyroid disease.Learn more about Skin Conditions
Fingernails can split for various reasons. Onychoschizia is a common condition that causes horizontal splits within the nail plate. The condition is sometimes accompanied by onychorrhexis, a condition that causes long-wise splitting or ridging of the nail. Together, these two conditions are called brittle nail syndrome.Full Answer >
According to NHS Choices, blue fingernails are caused by low blood oxygen levels or poor circulation brought on by exposure to cold temperatures. This condition is called "peripheral cyanosis."Full Answer >
The main cause of a purple tinge in fingernails is low oxygen levels in the blood. This can be caused by poor circulation, as well as habits that inhibit oxygen absorption such as smoking. A single fingernail may also become purple if it has been injured, indicating a bruise underneath the nail.Full Answer >
Vertical black lines under the fingernails are often the result of a splinter hemorrhage, according to WebMD. Splinter hemorrhages occur when the capillaries of the tips of the fingers bleed between the fingernail and the tissue underneath.Full Answer >