Analysis: Hello, for the corns, the cream is put on the corns to make the tissue inside the corns necrotic, and then pull out the corns. Advice: Generally speaking, after putting on the corns, you should change the corns once a day, however, you can also change the corns every other day. When replacing the old corns, the soles of the feet should be cleaned and the corns picked out. Then replace it with a new corns cream. In this way, after about ten days of repeated use, the corns on the soles of the feet can be removed.