Soreness from a bite or a pulled muscle?

We did an intense workout in athletics the other day and my left arm is weaker than my right...so the day after i noticed my arm was getting stiff and i couldn't extend it all the way, today i couldn't move it but my right arm is ok and has very little soreness there was also a bite where my arm is sore but that is right on the bisep(i dont no how to spell it) and it swelled up really big then it went away and the soreness came is it the bite or from the workout and is just a pulled the muscle