I had plantar warts was completely gone, and now warts come back and grow bigger. please help!

Not Uncommon...: If the warts appear in the same location as before, then the previous warts probably never totally went away in the first place. When warts are under treated, there is a good chance that they will reappear. They are caused by a virus, to small to be seen. By time your eye can actually see them, it's too late. Looks like you must begin treatment again.