It's not always dangerous, but the more often it happens, the more likely it is that you'll see chronic symptoms. It's not supposed to kill your dwarves, but it does slow down the extraction process.
I am sad because this does not appear to 'hook' into the dwarven health care system as currently appears to function and the 'missing bits' are taking punches at my sense of immersion. This astonishes me because LoFR is a very deep and detailed mod, and contains really good consistency and support, even for the Easter Eggs that I have found. I've almost never been jarred in my playing of this mod, so I'm going to explain the dissonance.
I can make myself view it as a purely mechanical 'snag' in the works. But the IC view of how it plays out is what's bugging me.
The healthcare system and wound system seems advanced enough that I've taken for granted I know 'what' is wrong with a dwarf, assuming the diagnoser is up to the task. If a dwarf is bleeding, I expect the game to tell me where it's bleeding from. When a dwarf has no symptoms or wounds but is covered by pus, and then suddenly its blood is on the floor, but no blood on it - and it's still covered with pus... I am picturing bloodcells having joined a cult and teaming up together to mass-teleport from the body to the floor. Is it vomiting blood? Probably not, it's not nauseous, there's no blood on the mouth.... the same lack of evidence trail rules out coughing blood, crying blood, blood oozing from the pores...
With the way the mechanics are playing out in game, it's incredibly hard to tell if the dwarf is still affected or not. Also to tell if it is spreading to other dwarves. In fact, the only reason I happened to check the inventory of the dwarf (and so noticed the pus) was because when it hopped up out of bed after being diagnosed the bed was all bloody - but the health screen said the dwarf was fine and needed no treatment. The dwarf hadn't been bleeding, bled because of the diagnosing, and now is uninjured or what? I had to check everything I could think of about it to try and understand the weirdness.
It was very jarring to watch the dwarf instantly collapse and other dwarves rush to carry it to the hospital, to see the legendary diagnoser run over to it, then have it leap up immediately after diagnosis like 'Oh, silly me, I'm perfectly ok, hehehe', to see health reports of nothing being wrong with this dwarf, but to see the bumbling thing wander off constantly seeping pus and erradically producing blood spatter from nowhere while it, the highly skilled doctor, and the rest of the fortress act like the 'medical emergency' of seconds before had been a false call and everything's great now.
Maybe this is how syndromes always are and have to be! I have almost no prior experience with syndromes affecting my dwarves, and I do have lower standards for syndromes affecting enemies and animals (if something doesn't get health care, I dont expect health care details about it).
In case it isn't clear, I -like- the syndrome. I like stuff like this in general! Make more of them - I just don't like the lack of 'supporting details'. I want to be able to see that the dwarf is still ill or that it has recovered, and I want to see if others catch it - without having to check the inventory of every dwarf in my fortress for a covering of pus
I want to know where a bleeding dwarf is bleeding from. I'd love to have a sense of if the symptoms are getting worse or better over time.
Is this lack of detail just how syndromes work in DF?