I know in middle school I had one pop up on the web between my thumb and pointer finger. Three more suddenly appeared on my middle finger. They were much smaller than the first one.

I treated (and treated and treated and treated) the large one for months. It finally fell out (yes, big eeeww!) one day, leaving a large hole in my hand. After that, the other three just disappeared.

So what I am suggesting is maybe you only need to treat the first one?