Bleach is not an effective treatment or prevention technique for toenail fungus. Bleach may burn the skin and should not be used (even in greatly diluted levels) unless prescribed by a doctor. Fungus infections frequently necessitate the use of oral drugs or specialized laser treatments. Even so, the infection has the potential to resurface. Bleaching your nails will not cure the problem it will just cause them to fall out sooner. If you have fungal infections on other parts of your body such as your scalp or feet, then your doctor may prescribe you medications that contain ingredients that are also found in bleach. Examples include ketoconazole and fluconazole. These drugs can be taken orally once a day. They will help prevent the spread of fungus while you wait for your nails to grow back. You should never attempt to treat a medical condition with over-the-counter products. In addition to possible adverse effects, this approach could lead to delaying necessary care. If you are thinking about using bleach on your nails, first talk to your doctor about whether it's safe for your health situation. He or she will be able to guide you through the process of topical skin care using products that do not contain any harmful chemicals.