Brittle nails and cracked skin can occur from persistent exposures of cold outdoor air combined with warm indoor air. To remedy dehydrated hands and fingernails, OB/GYN Dr. Lisa Masterson recommends applying petroleum jelly and covering them overnight to let the moisture seep in. Another solution is using the hydrating benefits of oxygenated mists, such as The OxyHandSpa by Pretika. This compact hand treatment may help alleviate the symptoms of dry and itchy skin caused by environmental factors or skin conditions such as eczema.