hi,corns are not a problem that will go away overnight..they develope through a localized pressure point over a long period of time..you need to see a paediatrist..or in english a chiropodist..fitting of shoes..or weight,or a million other problems could be the cause..all of which can be eased with chiropdy care..
Go to walmart and buy u sum corn medicine or see a foot doctor.I personally would suggest wearing a bigger maybe wider shoe.