Thank you for your patience;
you are correct in that intentional infliction of emotional distress (IIED) does not require physical damage; basically it requires extreme and outrageous conduct (as determined by a reasonable person-that is the legal standard) by a defendant that intentionally, or with reckless disregard, caused the plaintiff to suffer emotional damage. It does help to have some type of non emotional damage, such as loss of employment, loss of a loved one, etc.
For negligent infliction of emotional distres (NIED), since the defendant did not act with intent, the court raises the standard, and requires some type of physical damage that can then lead to the NIED cause of action.
Here is a case that does a good job explaining the court's standards:
". To succeed on a claim for negligent infliction of emotional distress, a plaintiff must first establish that he or she has a qualifying physical injury under Kansas law. Second, the qualifying physical injury must (1) directly result from the emotional distress allegedly caused by the defendant's negligence and (2) appear within a short span of time after the emotional disturbance. Generalized physical symptoms of emotional distress such as headaches, nightmares, insomnia, vomiting, anxiety, and nervousness are insufficient to state a cause of action."
That case is located here