where do calluses on your feet come from
Callus A callus is an area of thickened skin in response to repeated friction, pressure, or other irritation. Rubbing that is too frequent or forceful will cause blisters rather than allow calluses to form. Since repeated contact is required, calluses are most often found on feet because of frequent walking and incorrectly fitting footwear. Calluses are generally not harmful, but may sometimes lead to other problems, such as anskin ulceration or infection or cause the sufferer to try and offload the effected painful area, which can place excessive stress on the asymptomatic side.
Blister Friction blisters are caused by excess shear stress between the surface of the skin and the body. The strata of skin around the Stratum spinosum are most susceptible to shear. As the Stratum spinosum tears away from the connecting tissues below, plasma from the cells diffuses out. This plasma solution helps new cells divide and grow into new connective tissues and epidermal layers.