My 8 year old son and his 13 year old sister were having a dance off...Subsequently, she elbowed him in the jaw 3 days ago. I have (not professionally) examined his jaw several times; there is no clicking, no slight glitch, and he says there is no popping, clicking, etc. However, what I thought would be a couple days of soreness, now has not seemed to get any better at all. Out of all my kids, he isn't much of a complainer, (i.e. sensitive) which concerns me even more. Eating especially causes him discomfort, and at night he said laying on his jaw actually eases the tension. How long does jaw pain usually last...if a normal hit has occurred. Or, should I be more concerned in general?