The corns are basically healed in about two weeks. A corns ointment can usually be used for three days and can be replaced with a new one. After using the first corns ointment, you can see the loosening of the corns plugs, and with the 3rd-4th corns ointment you can see the corns fall off completely. When applying corns, pay attention to the stability of the ointment in the corns and never stain the surrounding skin tissue. Because of the strong corrosive nature of corns, it is easy to cause damage to the surrounding normal skin after misalignment. When applying corns, you should also pay attention to waterproofing to prevent bacterial infections, which will generally heal in about 7-10 days.