Now I've had pain during injections before. But nothing like this. I was doing my morning injection of test prop. As I pressed the needle in I felt a slight sting up and down my arm. Injecting in left delt. It went away. As I start pressing the plunger the sting started to come back the more oil I pushed in the worse the stinging got until I had almost a full cc in then it was a full on burn. Like a fire inside my arm. I pulled the needle out and blood squirted everywhere. This isn't uncommon for me considering the amount of oil I pump into them. Now I had an intense shoulder routine yesterday. And it had been 4 days since my last shoulder injection and it was still a little hard so I went slightly higher then I usually do. I have never experienced anything like this. Does anyone know what happened?? Damn it burnt so bad.