In no particular order:
First - get span and pitches checked by someone other than who drilled the ball.
Second - no bowling for several weeks - the finger tendons are nothing to mess with.
third - span will probably always be slightly different than it used to be - to avoid overstretching those tendons again.
Fourth - don't get a cortisone shot - makes the tissue brittle, and prone to tearing more. Yes, it helps pain, but it does nothing for healing.
Fifth - if she uses a computer, switch the mouse to the non bowling hand.
Sixth - get to a doctor - so that he can prescribe physical therapy - preferably by a certified hand specialist.
Seventh - from now on, use a wrist brace that will provide support to the back of the wrist. Something like the "columbia glove with wrist support"
http://www.bowling.com/display.asp?SKU=23048rIf I pick up a bowling ball without it, I can really feel it.
Been there, done that, feeling it right now as I type.
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-- Whether you believe you can, or you believe you can't - you are right.