you left your friend outside skateboarding whil you went inside to get water you came back  to him screaming holding his sholder that looked very deformed but there was no blood what type of injury is that

It sounds like your friend may have dislocated their shoulder. Dislocation occurs when the bones of a joint are forced out of their normal positions. It can be very painful and cause the affected area to look deformed or misshapen. It's important to seek medical attention as soon as possible for proper treatment and to prevent further complications.