Corns and calluses may or may not be painful. Some corns and calluses may not be painful when they first develop but then become painful over time as they thicken. The raised areas of skin – especially of corns – can be tender or sensitive to touch or pressure. Calluses tend to be less sensitive to touch than the normal skin around it. Sometimes cracks (called fissures) form in a callus. Fissures can be painful. If you had a corn or callus that becomes infected, you will likely feel pain or at least some discomfort.