Dermatologists assert that severe skin and nail diseases such as infections and even eczema can be caused by small symptoms that we often overlook. They may become brittle or thicken with age, and may even lose their shape. Kerassentials' creator says the formula can treat nail fungus and increase nail immunity. Laser Therapy. It is a light-colored oil that has a nutty aroma and flavor. Toenail fungus is an infection of the nail and sometimes surrounding tissue. Almond oil has been shown to have antifungal characteristics that can help prevent nail fungus growth. Chemically, silicon dioxide has antifungal properties that promote long-term good health. If you notice your nails are excessively thick, brittle, crumbly, or ragged, these are nail fungi symptoms. Only a small number of patients who take Lamisil have experienced liver impairment. Garlic is antifungal and can be used in a footbath to provide some relief.