Excessive friction, pressure and rubbing are part of the daily grind for your feet. Every day, they are put under extreme strain and, faced with all this micro-trauma, the skin tries to protect itself. It therefore produces more keratin, which makes it hard and thick. The medical term for this mechanism is hyperkeratosis. This excessive thickening of the skin can take two forms:
Calluses: These are areas of very thick, hard and rough skin. They form where pressure and friction are most frequent: on the heels, the sides of the foot and the arch. Over time, calluses take on a yellowish tinge.
Calluses: These are also areas of thickened, very hard skin, with poorly defined edges and a yellow colour. They are less extensive than calluses and are most commonly found at the start of the arch of the foot, beneath the toes.
A yellow discolouration of the feet is therefore generally secondary to hyperkeratosis. It is the build-up of dead skin that gives the skin this yellowish tinge.












