You should always seek medical help in the event of joint dislocation, but if that's impossible you can relocate your shoulder with out any help. Here’s how it’s done: Sit down. Interlock or ‘lace’ your fingers together. Put your laced hands over your kneecap (use the knee that corresponds with the dislocated limb; i.e., if your left shoulder is dislocated then lace your fingers over your left knee), Slowly sit back/pull back on your dislocated joint until it slips … (it hurts just as bad going in as it did coming out) back into place.
you can try, but you could also damage it more, but if you do not want to do it on your own you need to rush to someone who can help. If you wait too long it will swell and they will not be able to get it back in place and then need surgery.