Toenail fungus is a common problem which is difficult to deal with. Nail fungus does not look attractive. When your feet or hands become infected your nails become yellowed, thickened and brittle, it can be embarrassing and sometimes even painful. Knowing how to dilute tea tree oil for toenail fungus can give you relief. Tea tree oil has become a popular essential oil owing to the powerful anti-fungal it contains. It’s a popular treatment for many conditions, including toenail fungus.