This document investigates the effectiveness of tea tree oil as a natural treatment for athlete's foot (tinea pedis), a fungal infection of the feet. The author hypothesizes that tea tree oil, which has antifungal properties, can effectively treat tinea pedis when applied at different concentrations. An experiment is designed using Sabouraud agar plates inoculated with tinea pedis samples and treated with various concentrations of tea tree oil. The results will show whether higher concentrations of tea tree oil improve tinea pedis more than lower concentrations or the control plate with no treatment. If proven effective, tea tree oil could provide a natural alternative to conventional antifungal treatments.