Toenail discoloration (the toenails appear white, yellow, or greenish) can result from different infections and conditions of the skin. In about 50% of cases, discolored nails are a result of infections with common fungi that can be found in the air, dust, and soil. There are many species of fungi that can affect nails. It is important to get a proper diagnosis to make certain the condition is not serious.
The sooner toenail discoloration is treated the faster the nail will return to normal. Topical medications, or those applied directly to the nail are most effective when the infection has not: