These samples can be examined under the microscope in a lab to find out the source of the problem. It can be ugly, but it's harmless. The laser is non-invasive and does not cause any pain. Letting the fungus continue to grow and thrive within your toenails will only increase the challenge of fighting it. Other factors that may contribute to your condition include a history with athlete's heel and excessive sweating. This is because it is necessary for the production keratin, which is what makes skin and nails. Free radicals can be described as unstable molecules that attack DNA and cell membranes. Kerassentials oil allows you to take any precautionary measures that may be necessary as part of your treatment.