I am regular to crossfit. The other day I was learning kipping. I was fine during the workout but after 15 minutes I realized I cant feel my right upper arm(in the deltoid region), it was completely numb. I went to a physio and was diagnosed with a spasm in my trapezius near the neck. I am being treated with ultrasound already but it has been three days and I dont see any relief. I now have upper back pain and also any sudden movement of right hand gives me a shock/stinger in my right upper arm(deltoid). Has this been diagnosed correctly and if so is it normal to get sudden shocks? Any treatment suggested?