Fungal nail infections are common infections of the toenails. As the fungal infection progresses, the nail can become brittle, crumbly, distorted, or thickened. This can cause the nail to separate from the underlying skin. Fungal nails cannot be cured. At Step Forward Foot Care Kingston, we will attempt to prevent the determine the length of time we will treat your nails. The course of treatment will take six months to a year, or longer.