A discolored toenail usually means that something is wrong, and unless you have another obvious explanation, you should consider the possibility that you have a fungal nail infection. Other possible explanations would include a recent blow to the tip of the toe, causing bleeding and blackening under the nail, bacterial growth beneath the nail (often a green color), continuous use of nail polish on the nail, or some other uncommon medical condition. The problem, however, is usually fungus. Continue reading →