If it is fungal you might try baking soda and water paste on it a couple of times a day for three weeks. If it does not start to look better in a few days you can stop treatment.
Another good thing to try is Jojoba & Tea Tree Oil from Dr. Schulze at http://www.herbdoc.com
there is a cream and an oil - I have had a lot of success with the oil on a fungal skin infection.
Another very good cream for skin conditions at this URL: