For mild fungal infection, go to the drugstore to buy potassium permanganate tablets, take one tablet and make a solution according to the instructions and put it into a bottle (if you have children, keep it out of their reach to prevent accidental drinking!) For later use, dip the affected area into the solution for one minute, then rinse your fingers with water and soak three to five times a day.
Do not touch your head or other parts of the body with infected hands to avoid infection.