I had a fungal infection on both big toes under the nail. It got bad enough on one nail for the nail to fall off. I had my doctors advise me and none of the usual treatments were effective. Then another doctor told me that one of her patients had tried Canesten antifungal cream and Tea Tree oil combined. I applied one drop of tea tree oil spread over the nail and edges then immediately applied a small amount of Canesten cream to the same area twice a day. The effect was astounding, within 12 hours the white fungus had become very dark. The fungus had been stopped in its tracks. I did continue the treatment every day until the nail had grown sufficiently and looked normal again. Whether the tea tree oil is necessary I am not sure but the combination certainly was totally effective. Canesten may have been effective on its own or maybe the oil carries the canesten under the nail more efficiently.
The photo was taken at an earlier stage before it got a lot worst.