First of all, we must clarify the definition of corns, corns are mostly because the skin of the foot is subject to mechanical extrusion, friction induced inverted cone shaped keratin layer hyperplasia, so corns can not dig out the root. The existence of corns with roots may be influenced by folk digging corns, repair corns, most of the verbal expressions called digging out the root, in fact, there may be two problems: 1, wrong diagnosis: not corns, common warts in the soles of the feet called plantar warts, viral infection will cause dermal papillary hyperplasia, will pull out a lot of roots; 2, fake: no digging out the root, just the tiny cotton threads, etc. hidden in the fingertips, pretending to dig, inadvertently The small cotton threads that are hidden in the fingers, pretending to be digging, inadvertently pinching out one by one, claiming to have dug many roots. The actual fact is that there is no root in the corpuscles themselves, only the common warts can be said to dig out the root.