Lemon poultices applied overnight are a good home remedy for corns and calluses. Place a slice of lemon approx 5 mm thick on to the corn, bandage and fasten. Dabbing the affected area with lemon essential oil also helps accelerate the healing process. Take care to only use the undiluted oil on the callused area using a cotton ball or Q- tip, as it is too strong for un-callused skin.