Why is my pinky curled?
Although Dupuytren's isn't always painful, it does restrict movement. The thickened tissue forces several fingers -- usually your ring and pinky fingers -- to curl in toward your palm. The bending caused by the thick tissue is called contracture.
Can I playing guitar with bent pinky?
It comes down to what you want to play and what you need in order to play it. It may also be the case that you're comfortable using your pinky, except when you move to the higher frets. ... So the answer to the pinky question is that you don't have to use it per se, but it certainly won't hurt your playing if you do.