Does drawing a white card for Tarot cards mean drawing another card?

Because I don't know the question and background of your card drawing, it is difficult to answer the white card like this.

Generally speaking, white cards can be understood as cards before 0 fools. You can think of it as "empty" because it is a hotbed of breeding, and you can't see it as "there" because it looks like nothing, similar to the concept of embryo, and still very primitive. Once it grows, its vitality may be amazing.