Heavy manual labor, protein deficiency, yeast infections and chemical exposure are causes of peeling fingernails, according to New Health Guide. Other possible causes include weather changes and medical conditions such as psoriasis.
The treatment of peeling fingernails depends on the cause. Wearing heavy gloves protects nails during manual labor and prevents contact with irritating chemicals. Gloves also reduce the need for handwashing, reducing moisture in and around the nail bed. This discourages development of nail fungi and yeast infections.
Consuming adequate amounts of dietary protein makes nails thicker and less brittle. Meat, fish, beans and soy foods are excellent sources of dietary protein, according to WebMD.