If you're cutting your nails too short this is what happens.
Which is i why i really wish i didn't pick/bite my toenails. I've had this nasty habit of doing it probably since the age of 5. And quite often my Toes AND Fingers end up with some damage. Usually i damage the nailbed which results in blood, and i've picked off the whole Toenail from the Little piggy on my right foot.
Possibly the two worst ones though have to be;
When i tore through a large part of my thumbnail (Both of them) and because the actual nailbed was on show, my finger grew some puss-ey skin or whateva (I guess the equivalent of a scab, but it was soft and slightly stretchy) and then inbetween that skin and the NailBed, it filled with some sort of Septic fluid (which as i hear, was good) Unfortuantely it looked like i had two green maggots attatched to my thumbs, plus i wasn't allowed to go in the Swimming pool (Stupid Health and Safety issues)
And
Recently, i had some of my toenail deep into the side of the skin surronding my Big toe on my right foot, really deep (Starting to go ingrown, i guess) So i started to pick at it, and got a bit carried away, leaving me
accidently ripping a large chunk of skin out of the skin that surround my Big Toenail. And as this part grows back, i keep picking at it (Because i really am an idiot) and each time i pick at it, the scab comes back with even more "Septic [?] fluids" and Blood, which really stings. and because im too much of a dipstuff to actually tend to it, it hurts a lot. And really bad, if i knock my right foot, it stings like a bitch. Im surprised i got through PE today (I probably wouldn't have been doing it, if i had told my parents. But ive been warned about this before, and my Mum would turn it against me with some snappy comment (Annoying "Know-It-All" Mums) And it doesnt help that my Trainers have no grown too small for me, and i was forced to cramb this swollen, puss-ey and bloody toe into it, while being crushed by my other toes. Serious pain. So yeah, thats happening to me at the moment. Not the Thumb one, just the Toe one.
tl;dr---
Dont pick your nails, it hurts Do pick your Toenails. Your [Foot Doctor?]needs the money