Slight tangent, does "malaise" have a more specific meaning in this context? Google gives me "generalized feeling of discomfort, illness, or lack of well-being." which is unhelpful.
It means exactly that. It's not a good diagnostic symptom since (a) it may come on slowly and not be noticed as a change and (b) there are a huge number of things that could cause it. But if I noticed small mouth sores and then realized I had been feeling vaguely bad for weeks I would be more concerned about a vitamin deficiency than if only the first symptom were present. (Otherwise, well, maybe I have picked up a habit of biting my lips in my sleep.)
The symptoms of vitamin D deficiency I found are even less useful. Neither of the people I know who've had...
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous "stupid" questions thread is at almost 500 questions in about a month, so I think it's time for a new one.
Also, I have a new "stupid" question.