They are very sore to walk upon, because these callous places are sensitive and have numerous centres of little corns. The tendency to build up and indurate belongs to the remedy. Warts grow upon the hands. The hair is unhealthy. Pustules form upon the skin with red areola.
Pustular eruptions have an inflamed base that is red, and sensitive.
Now, if you will study the proving and get the particulars of the remedy, and fit them into this framework, you will understand something of Ant. crud.