The clinician applies liquid nitrogen with a cotton- tipped applicator to the wart. The wart initially turns white and then resumes its normal skin color. Because of the intense cold, one may feel a burning sensation where treated. Usually, it is necessary to repeat the treatment every 1-2 weeks. These usually contain lactic, acetic, and salicylic acids.
Medical practitioners believe that acid paints damage wart cells, causing the wart to go away.
Your physician or nurse practitioner will explain how to use the paint. This is used mainly for treating venereal warts. A clinician applies podophyllin with a cotton-tipped applicator. The podophyllin should be rinsed off if it begins to burn or at a time indicated by your health care provider. As the treatment progresses, the length of time that the podophyllin can be tolerated increases.