How to cure a dead fingernail?  

Ouch!!!

If the nail is black or discoloured this will just be blood underneath the nail from where you have bruised it.
As the nail heals it will start to produce some new cells, you will probably find that your first'new' nail will be a little bumpy, but will eventually grow back normally.

If it is really painful ans swollen you may need your doctor to make a small hole in the nail to relieve the pressure.

Take care, and me more careful around car doors!!!!

hey dude look if it is very paining then at least to reduce the pain you can take a high dosed painkiller .......that can at least reduce the pain and then you can use some antiseptic over the wound because it will take some hard time to get well........ok man by by take care........

Hi, screwdriver. This had to have been very painful, I can see. I have bruised my thumb and fingers a good bit of times in my life. I have even missing hit my thumb into a frozen dinner plate. On the instructions, it told me to puncture the plastic with a knife. And instead of using a butter knife, I used my thumb. And so, when I did that my nail plate was bleeding from the inside. It was dark at the edges of my nail plate. This did not go away like that. The pain lasted for about a week and the blood did not dry all the way up until two to three weeks later. I was so mad at myself for doing something so silly as this. My husband told me that I should have just cooked the dinner plate just like it was, without removing the plastic. But this day, I was lazy and I wanted to take the easy way out. I have bruised myself up so many times. You could never tell that I had any accidents, because my skin has completely healed. There are no marks of any kind. It is something how I body works to heal. Yours will heal too. Hopefully, you did not have any broken bones. When in doubt, consult with a doctor just to make sure. I hope that your thumb will feel better very soon. Take care.

It may start looking real yucky. But it will eventually grow off. It will take it a long time thou probably!...sorry...

what else u can do except covering it... u need to cover.. and let it heal naturally..

For me I don't cure it let it cure it self, the thing you can do now is to conceal it from public....

hi screwdriver ouch ouch ouch. wow that must have really hurt.
You will have a poor ugly looking nail for awhile until the
blood all absorbs away.if it puffs up or is more sore than you
think it should be go to your doctor. most times its just a blood
blister under the nail and will go away in time. take some
ibuprofen for pain as needed and be careful.I like a dummy a couple of
weeks back had three of my fingers resting on the front door sill of
the goldcrest van when the driver pressed the remote to close the front door and there I was with three fingers trapped and pinching so dont think I did not yell and she rushed over to release my hand from the sliding door. wow, and the silly thing is outside of some roughted up skin I didnot have any broken bones. a very small amount of bruising but one of the other residents put his hand on my hurt fingers, sad something and the pain disappeared. I do not have the foggiest idea of just what he did but it healed my fingers, he is a very devout christian and sings in his church good luck on your thumb nail.

I don't think there is anything you can do. It will probably turn black and blue and eventually it just grows till were you can start cutting it off.
Sometimes the whole nail just falls of depending on how bad you hurt it.

OWWWW! your thumbnail should heal on its own; just give it time. either the nail will grow and you can clip off the dead portions as they are pushed up. or if the whole nail has been damaged it might eventually fall off on its own too; then new nail should grow in its place unless the nail bed has also been damaged in which case you won't have a thumbnail anymore :( let's hope for the best :)

it will heal by its self...

if it is still painful, you just take a pain reliever. don't attempt to be surgeon, coz you might get infected. it'll make things worse.

just be careful next time. ok?

:D