Fingers were cut off by a knife, and a lot of meat was cut off. After healing, the meat didn't grow back, a piece was missing from the fingertip, and the radian of the fingertip became strange.
The tips of fingers are almost all thick cuticles with no cell activity, the deep layers are self-healing epidermal cells, and then almost all the bones are muscle cells. Cut off the meat at the fingertips, in fact, the healed part is only the epidermal cells. The stratum corneum is the cytoplasmic "corpse" accumulated after the cells have been hung for many years, which cannot be recovered, so there will be a piece of meat missing ... This is basically impossible to recover, and the newly grown epidermis has lost the protection of the stratum corneum, and it often hurts because it can't stand friction when using hands. If the cuticle is completely restored, it will probably take you so long now. ...