You can only sue if there was some real physical injury or economic harm: lawsuits are designed to provide compensation for actual injuries or financial loses, not just to vindicate your rights. If your son is ok and you did not incur large medical costs due to this, there is no point in suing: you will not get anything.You could potentially file an ethical complaint with the state's medical licensing boards, if you want the doctor to suffer some sanction or at least be told that he did something wrong.