Drinking too many of these products can be harmful to your health. But, if the problem is not treated quickly, it can get worse. It's important to monitor symptoms and seek treatment as soon you notice any changes. If one or more nails are discolored, brittle or crumbly than normal, you may have toenail fungus. Nail fungus can be treated with no quick fixes. However, some research suggests that mouthwash containing Chlorhexidine may have antifungal qualities. It's possible to try it, but you should see a podiatrist if you don’t see results within 2 weeks. In fact, a fungal infection can fester for weeks or even months without being detected, especially if a person doesn't regularly inspect their feet and toes. There are several options for treating a toenail fungus at home, but not all of the options may work for you. Depending on what medication your podiatrist prescribes, the application process may be different.