In pain during hitting in football?

Hi I am a somphmore and I play high school football and I play offensive line and defensive line and when I hit and make contact with another player my left tricep and left deltoid are always seem to be in pain for like 5 minutes and eventually the pain goes away and when I am not playing football my arm is fine but I dealed with the pain all last season and is still an issue today and is effecting my performance on the feild and in the weight room and I dont know what to do? I thought about seeing a doctor but my mom said they cant do anything please help thanks