Guidance:

3%-5% acetic acid solution coated or applied to the suspected damaged skin to make the warts of the warts of the warts of the acromegaly whitened, so it is known as the acetic acid white test. The test is generally applied to the local area with a cotton swab, with a cotton ball or gauze (first soaked with 5% acetic acid solution) covering the local area, according to the different parts of the 1-15 minutes, with the naked eye or with the help of a magnifying glass to observe the local whitening is positive