ok can i get some info? b is the nail splitting at the tope and then down to the cuticle? or is it fromt he cuticle and up? it sounds more like trauma to me. has your child hurt the finger at all? i am a nail tech and you can email me with any ?sWhat causes nails to split, starting at the cuticle?
I am not 4, but mine did it because my Iron was extremely low.