For each wart, usually only one treatment is necessary. In persistent cases, repeat the treatment after ten days. Do not treat the same wart with Wartner more than three times in total. Consult your general practitioner if three treatments have not led to improvement. Wartner works as follows:

1. You can recognize a normal wart by its rough, 'cauliflower'-like surface.
2. The skin turns white when you press the foam applicator on the wart or verruca. A slight aching, stinging sensation will occur as a result of the freezing. After removing the foam applicator, color loss and the aching, stinging sensation will rapidly lessen.
3. As a result of freezing, a blister will form under the wart or verruca. This may not be visible to the naked eye where there is a thick epidermis.
4. After about 10 days, the frozen skin with the treated wart or verruca will fall off. In the meantime, new skin will have formed under the blister.