Finger Injury at gym; ripped nail off

Hello, my younger brother sustained a finger injury when he was at the gym. He had a mishap with a machine and it ended up slicing through his index finger, under the nail. The nail was ripped off and part of the upper nail bed (in the body of the finger itself) is exposed.
He put the nail back into place, however the nail bed (?) is still exposed. Should he go to a doctor and get stitches for the injury?
See photo: [IMG]http://i51.tinypic.com/2nbd2k7.jpg[/IMG]

[7thebusiness]

http://tinypic.com/view.php?pic=2nbd2k7&s=7

[Michael Gonzalez-Wallace]

I would go and see a doctor asap since there is a clear skin damage and possible infection at the soft tissue level. Stitches are important but infection it is likely if it goes untreated.

I hope he feels better