If a prickly pouch develops on the bottom of the foot, the vast majority of healing is obtained clinically with salicylic acid preparations or corns. The root cause of the disease is extrusion or local breakage of the skin tissue and the entry of a foreign body, resulting in a foreign body granuloma. From the medical treatment point of view, the only way to cure a foreign body granuloma is to remove it completely through surgery. However, since the sole of the foot is prone to contamination, most patients cannot be cured and are prone to recurrence if they are treated with surgery alone. Therefore, the main clinical treatment for corns on the soles of the feet is a salicylic acid cream, which is used to relieve or cure the clinical symptoms through slow erosion.