The most common answer would be it's overused. Our body also wears out if used too much. it is very important to rest and ice the shoulder after several games in a day. Other causes would be improper mechanics and lack of flexibility. Make sure you're doing the correct movement and have proper warm up before and flexibility exercises after.
Know your body, don't force anything if you feel there's something wrong.
All of them. But rotator cuffs usually go first for pitchers and knees for catchers.
A new piercing and you want to dive on it? Yes it will hurt the piercing.
softball is a really tough sport if you would not want to get hurt i would inform you not to play, if you play you may get hit by a softball alot, and if you want to play... just be prepared
My shoulders hurt.
Yes because it would not hurt anyone.
the ones in there knees, shoulders, and elbows.
The velocity of the softball that is pitched is fast enough to hit the catchers glove with a lot of force so it causes the catcher's hand to sting or hurt
Yes, it can any gun for that mater will.
It can sometimes. It will make your chest hurt but sometimes the pain shoots to your back and they can shoot up to your shoulders from there
The use of a softball glove is so it does not hurt your hand when someone throws it and it is also used for an aim so you do not have to aim with your hand. ( That would look silly.)
You roll your head around on your shoulders. It may hurt, but you should try and stretch it; if you keep it worked, it will help realign things.