My son has a verucca, his first, and the first one I have ever seen. The advice was to rub it with a semi-ripe banana skin for 2 minutes, 2-3 times a day and eat two apples a day. It vaguely reminded me that I had heard banana skin was good for getting rid of them and so much better than using chemicals. Unfortunately when I rubbed, it tickled DS1's foot too much so I have stuck the skin on with some plasters and hope that will help.
No idea where the apples fit in!
The things you learn.