2.  A corn is thickened skin on the top or side of a toe  It is not a serious condition  They form to protect the skin  There are two types- hard and soft  The type is determined by the inner core, which can be soft or hard, and by location  A soft corn is found between toes  A soft corn is often found over a bony part of a toe

3.  Usually on the fifth toe  It is not easy to identify by appearance  Are rough to touch

4.  Usually on the fourth and fifth toes  Is easy to press in when touched  Can also be found between the toes

6.  A hard corn is firm and thick and may have a soft yellow ring with a gray center  A soft corn looks like an open sore

7.  Pressure or friction on the skin  Tight shoes squeeze the foot  Wearing shoes without socks can lead to increased friction  The foot may rub up against a seam or stitch inside the shoe  Socks that don’t fit may result in pressure where the sock bunches up

8.  Thickened skin on your hands or the soles of your feet  Can form on the knees or elbows  On the hands, they generally form at the base of fingers  On the feet, generally form on the ball of the foot, the heel, and the underside of the big toe  They form to protect the skin

10.  Skin may be thick and hardened  Skin may be flaky and dry  May appear grayish or yellowish  May feel bumpy

11.  The repeated handling of tools cause calluses on the hand  Walking barefoot  May be caused on the feet by repeated pressure due to sports

12.  The callus or corn may be softened and removed by using salicylic acid  These treatments are available in applicators, pads, drops and plasters  This treatment can’t be used by people with diabetes  Other treatments include wearing gloves or special pads on the feet to keep pressure away

13.  "Calluses and Corns Causes and Treatments." WebMD. Web. 13 Feb. 2012..  "Corns Symptoms, Causes, Treatment - How Can Corns and Calluses Be Prevented? on MedicineNet." Corns, Symptoms and Causes. Web. 13 Feb. 2012..  "Corns and Calluses: MedlinePlus Medical Encyclopedia." National Library of Medicine. Web. 13 Feb. 2012..