Touches: It won't stop you from feeling the pain. Just might help prevent further injury.
Unless I'm mistaken though, he can't just wear it right away and go back into games. I believe it has to be somewhat healed before he can do that. Also, he'd probably have to get dispensation from FIFA to be allowed to wear it during games (like Davids and his goggles).
Also, how long it takes to heal depends on where it is exactly (above de eye, below, near de temple, close to de nosebridge, etc). And trust me one of the last things yuh want is a loose piece of bone floating around near yuh brain when yuh looking to head a ball.