The spelling of the word "hard corn" could be confusing to those who are not familiar with its pronunciation. However, with the use of IPA phonetic transcription, it can be easily explained. "Hard corn" is pronounced as /hɑrd kɔrn/ where the "h" at the beginning is pronounced softly and the "d" in "hard" is silent. The "a" sound in "hard" is pronounced as /ɑ/ while the "o" sound in "corn" is pronounced as /ɔ/. With proper knowledge of IPA transcription, spelling and pronunciation of words become less intimidating.
Hard corn refers to a thickened area of the skin, typically found on the toes, soles of the feet, or fingers as a result of repeated friction or pressure. Also known as a corn or a callus, it is characterized by its tough, hardened, and thickened appearance. Hard corns form when the skin's response to pressure or friction is to produce additional layers of dead skin cells in order to protect the affected area.
Hard corns usually develop in response to ill-fitting footwear, improper walking or running techniques, or prolonged physical activities. The friction caused by these factors leads to the formation of a conical or circular-shaped patch of hardened skin, which can be yellowish or grayish and may have a central core that puts pressure on the deeper layers of the skin, leading to discomfort or pain.
While hard corns differ from soft corns – which are smaller and typically form between the toes – they share similar origins and characteristics. However, unlike soft corns, hard corns do not cause excessive sweating or moisture retention. Hard corns are generally not contagious but can be bothersome or painful when excessive pressure is applied, making walking or standing uncomfortable.
Treatment options for hard corns may include wearing properly fitted shoes, using protective padding or orthotic devices, applying over-the-counter corn plasters or pads containing salicylic acid to soften the corn, and schedule regular podiatry treatments for professional corn removal or trimming. Severe cases may require surgical intervention or prescription medications.
The usual form of corn over a toe-joint.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.