Man in the Funny Hat
Hero
The closest response is "No, a PC can lose hit points without it indicating he has taken any physical injury." but "physical injury" is vague - and that's as it should be. Hit points themselves are vague, abstract representations. What they represent and HOW WELL they represent them varies with the weapon inflicting the damage, the damage compared to the hit point total of the victim, and on and on. Back in the days of 1E we would routinely blow off a really high-damage hit by saying, "It's all fatigue."
Things haven't really changed since then. Any or all of the hit points a PC takes in damage can be actual, physical, bodily trauma - but you can NEVER, EVER say, "THIS hit point, THIS percentage of the damage is physical injury." Because hit points are abstract, representing a wide conglomeration of physical and meta-physical (even meta-game) factors you cannot, by definition, specify that any one hit point, or range of hit points represents any single, specific factor.
Things haven't really changed since then. Any or all of the hit points a PC takes in damage can be actual, physical, bodily trauma - but you can NEVER, EVER say, "THIS hit point, THIS percentage of the damage is physical injury." Because hit points are abstract, representing a wide conglomeration of physical and meta-physical (even meta-game) factors you cannot, by definition, specify that any one hit point, or range of hit points represents any single, specific factor.