The other day my friend tackled me and we fell on to the grass and I landed in my right side. My body didn't really hurt just got a head ache. But when I got home a few hours later my shoulder started to hurt. It's only been like two days and my brother says he thinks its just my muscles that are hurting since i could I could move my arm just fine. The location of where the pain hurts i'm not sure what its called but its where doctors usually give you shots on you arm only in the front not the side of my arm. So how do I get rid of the pain? About how long should it take before it goes away? Any suggestions?