Did you know that over 35 million people can suffer from toenail fungus each year? Its official medical name is onychomycosis or tinea unguium. This infection of the nailbed on your feet makes your nails yellow and brittle. It can also be really painful, which is hard for people in professions who have to stand on their feet all day. However, you can use some of our wonderful essential oils to help you relieve the symptoms and treat this fungal infection.