Callushttps://en.wikipedia.org/wiki/Callus
Callus is in gebiet fan dikke hûd dat foarmet as reaksje op werhelle wriuwing, druk of oare iritaasje. Calluses binne oer it algemien net skealik, helpe blieren te foarkommen en biede ek beskerming. Oermjittige formaasje kin lykwols soms liede ta oare problemen, lykas hûdulceraasje of ynfeksje.

Behanneling ― OTC Drugs
It is wichtich om te soargjen dat it gjin wart wurdt.
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  • Callussen binne oanwêzich op de plantêre foet (plantar) en de laterale foet (lateraal).
  • Corns (calluses) komme symmetrisch foar op beide fuotten, dêr't druk wurdt útfierd of dêr't de skoen drukt tsjin de foet. As in ferlykbere lesion optreedt yn in gebiet sûnder druk, moat in wart wurde fertocht.
References Corns 29262147 
NIH
Corns ûntwikkelje fan werhelle wrijving of druk. Corn is in spesifyk gebiet fan dikke hûd, wylst callus mear ferspraate is. Corns komme faak foarby atleten of minsken mei foetproblemen lykas unjildige wriuwing fan skuon. Se binne ek gewoan yn 'e âlderein, diabetici en amputees. Corns moatte wurde sjoen as in symptoom ynstee fan in standalone betingst.
A corn, also known as a calvus, heloma, or focal intractable plantar hyperkeratosis, is a type of callosity. Corns are uncomfortable, thickened skin lesions that result from repeated mechanical trauma due to friction or pressure forces. In the literature, confusing terminology is often used to call different types of hyperkeratotic skin lesions. Nevertheless, a corn should be distinguished from a callus, which is a more diffuse type of callosity. Thus, a corn is a well-delimited focal area of hyperkeratosis. This condition is often seen in athletes and patients exposed to unequal friction force from footwear or gait problems, including the elderly, patients with diabetes, and amputees. It should be regarded as a symptom rather than an effective disease.
 Clavus 31536205 
NIH
Corn, ek wol bekend as in clavus, is in mienskiplike foetkondysje dy't yn kliniken sjoen wurdt. It is in dikke bult fan 'e hûd, feroarsake troch wriuwing of druk, faak pynlik. It is wichtich om it te ûnderskieden fan calluses of wratten. Calluses binne fergelykber, mar hawwe gjin sintrale kearn en binne minder pynlik. De behanneling rjochtet him op it ferminderjen fan symptomen en it foarkommen fan takomstige problemen. It behanneljen fan dizze pynlike tastân kin it libben fan pasjinten sterk ferbetterje, benammen foar âldere of aktive persoanen.
A clavus or clavi (plural) is a frequently encountered condition in the out-patient clinic, known colloquially as a corn. It is one of the many hyperkeratotic lesions of the foot and therefore requires differentiation from other etiologies such as calluses or plantar warts. A clavus is a well-demarcated thickened area of the epidermis that has a central core. This skin lesion is most commonly found on the foot and is often painful. A clavus results from repeated friction, pressure, or trauma to a specific area of the foot. A callus is another hyperkeratotic skin lesion that is similar to a clavus. It is an area of thickened epidermis with less defined borders and is also the result of repeated mechanical stress. Additionally, calluses lack the painful central core seen with clavi. Calluses most commonly present on the hands and feet. The older and the physically active are most commonly affected by clavi. Treatment focuses on symptomatic relief and lifestyle modification to prevent future clavus formation. By treating this painful and sometimes life-altering skin lesion, physicians can have a profound impact on their patients’ lives.