When applying corn plaster, it is essential to apply it until the area of the corn turns white, remove the white callus, and then continue to apply the plaster. Keep applying until the surrounding skin no longer turns white, leaving only the protruding corn. Once the root of the corn has also necrotized, it can be pulled out from the root. If there is still pain when pulling out the corn, continue using the medication. When the dead skin on the corn turns white, clean, with clear lines, and the newly exposed tender skin is smooth, clean, with clear lines, and there is no pain when pressed, this condition indicates recovery. Corns generally occur due to prolonged pressure on the foot or wearing tight shoes, causing sustained pressure and friction over time.