Hi, i was playing touch rugby last week and someone ran into my arm when i had it in the 'stop' position. i herd a few crackels and it went numb but recovered feeling. its a week later and my shoulder and upper arm sharp pain on certain moments?

Arm Pain: You may have some soft tissue damage or something else. Please see your doctor for diagnosis. He/she will let you know if all is well or if you need treatment. Peace and good health.

Need eval: This could either be arm or a break/crack in the clavicle on that side. The clavicle is the most often broken bone in humans & symptoms can be subtle. You need a doc to examine you & possibly an x-ray. Treatment if needed will depend on the findings.