Healing time frame of a smashed thumbnail. Starting at day 8...
It is called a "Subungual Hematoma"
If your particular nail smash is bad enough to go to the Doctor, he/she can preform a decompression called a trephination (a small hole drilled into the nail) which allows the underlying blood to drain and relieve pressure.
You can do this yourself with the appropriate prep, however it may be better to see the doctor for that procedure, if you can afford it and if its that bad.
