At worst it can skin your knuckles sprain your wrist or even break.
Can you break your hand on a punching bag. Can you break your hand by punching a punching bag. If ever you get a chance go to a boxing gym or somewhere that has punching bags and has been around for a long time. My instructor told me to see if itd hold up after we duct taped it because I put a small tear in it working my side kick.
With proper technique your hands will land in a way that can handle this pressure. You can also bruise your knuckle after a bad fall or twisting your finger. First there is a horizontal force transferred to the mount created by the impact.
Heavy bags are not bad for joints. If you connect with your pinkyring finger knuckles your more likely to break your hand. Other common causes include fights contact sports and accidental falls.
Depending on the wrapping style hand wraps may leave your knuckles bare or cover them for some slight protection. When you punch a heavy bag a couple of things happen at the mounting point. If you land a punch on their forehead your more likely to break their hand.
Boxing coach Bill Packer notes that just about anybody can punch a boxing bag around. The bags motion can loosen all but the. More than 10 years.
You will notice that they have bags that are wrapped tightly with duct tape somewhere near the areas that are. You can break your knuckle while falling down working with machines or doing any activity that exposes your hand to trauma. Before using boards practice striking a punching bag to develop the right technique.