Black holes in the corns during pedicure, consider that it may be a bleeding keratinous plug. Corns are foot skin prolonged pressure or friction caused by cuticle hyperplasia, mainly manifested as yellowish or dark yellow keratinous proliferations, the surface is relatively smooth, the deep part of a conical keratinous embolus, the tip of which is wedge-shaped embedded in the skin, when walking under pressure, local capillary rupture hemorrhage can be coagulated locally to form a black scab, the keratinous embolus can be seen in the black holes after removing it. Patients with corns will feel severe pain when standing or walking due to the pressure on the corns. For those with severe symptoms, they should go to the hospital in time, and the corns can be removed through medication, surgery, physical methods, etc. And they should avoid pressure and friction on the feet, and choose the right shoes. If diagnosed with corns, it is recommended that standardized treatment be carried out as early as possible to reduce the adverse effects of the disease.