Toenail fungus is an infection that gets in through cracks in your nail or cuts in your skin. It can make your toenail change color or get thicker. It can also hurt. Because toes are often warm and damp, fungus grows well there. Different kinds of fungi and sometimes yeast affect different parts of the nail. Left untreated, an infection could spread to other toenails, skin, or even your fingernails. Natural remedies containing Argan, Tea Tree, Clove, Rosemary and Pomegranate, Oregano Oil may help to keep nails in better condition, restore them.