What are some exercises to get rid of stiffness after 4 weeks of broken finger and casting?

Slowly and easy: At your age, there has probably been significant healing but it is still not complete. Do not overly stress the fracture site. Start out with a soft stress ball and squeeze it 10 or 20 times. If it hurts, don't do it! if the fracture involved a joint then there may be permanent stiffness. Warming your hand can reduce stiffness early on and help movements. After a few weeks try a hand exerciser.

There are many types: Of exercises for hand finger stiffness and many people need to have a hand therapist helped them with these. However a common set of exercises used by many is referred to as six pack hand exercises and if you look that up you'll find many examples on the internet however if you're having trouble a visit with hand therapist is an excellent investment remember they have spent a lifetime of learning how to help you get your fingers better while this maybe the first time that you never been through thi the earlier one gets better the easier time it is.