From this bug forum thread.What would be nice is a 'rediagnose' thing, yes. But also a 'Forced bedrest' option for dwarves who can't make it to the food stockpiles without passing out again and again...and dying as a result. Essentially, allow the player to designate a 'recover wounded' order on a dwarf who is trying to be tough and kills himself while trying to lift a barrel of booze to his parched, cracking lips.
This could just be solved by creating a food/drink stockpile next to the hospital. Or designating someone as a nurse, who has only the "give food/water to wounded" labor active.
Doesn't help if the dwarf gets up on their own, because it is then 'treated', and extreme pain, lapsing into unconciousness, etc., are not something that suggest further treatment is needed.
In my view, the optimal setup would be to have a dwarf exhibiting signs of pain to be taken in repeatedly for work until they can fully heal (if this means they get cut open and die, well, that's dwarfy). And so, I propose a new noble position: Dr./Nurse StrongArm. This position is essentially the fortress guard repurposed to ensure that a dwarf meant to be in bed or suffering from pain and unconciousness is found and led back to the hospital.
So, the order of the medical process would go thusly:
1. Recovery of wounded
2. Initial diagnosis
3. Treatment
4. Recuperation
5. Final diagnosis to clear patient to exit medical care.
Without a clean bill of health (or close enough, if it's a missing lung or eye or something), Dr/Nurse Strongarm goes and finds the dwarf who isn't being a good patient and dragging them back to bed.
This would take care of the worst offenders, dwarves hauling their broken bodies around the fort in order to get to food, allowing the 'bring food/water' behaviors to work properly while you work to fix everything up.