What does a corn look like? – They’re most likely to be on your feet, since whenever you walk or run your feet rub against your shoes, but if you work with your hands you can develop calluses there as well. The friction created when skin rubs against shoes or other tough materials creates spots of tough, dead skin. Feel your feet and hands for small bumps or lumps that are hard and discolored.
This video is showing how a corn look like.
This picturesis showing how a corn look like.