If left untreated, verrucas and warts can spread and become painful. Verrucas can be sore to stand or walk on. Verrucas and warts could spread in the same area as well as to other areas of the body and to other people.
Generally speaking, the earlier they are treated the easier they are to get rid of.
The earlier you Bazuka that verruca, the quicker you tackle that infection.