They may also: 1  Have a combination of skin, hair, and eye color that is outside the range for humans. 2  Some different preferred environment to humans (e.g. mountains, caves, tundra, deep forest). 3  Some sort of crafting/building ability. Lots of dwarves have this trait. 4  Be Always Chaotic Evil, Always Lawful Good, etc.
Chronic forms of sinusitis are also thought to potentially be a cause of the condition. Whatâs most important to understand about black mucus in nose areas is that it is not normal. There is something that is causing the change in hue in the protective goo.
The idea that smoking causes black lungs is no more than a myth, and the evidence for this is plentiful. Possibly the first thing people say on the subject is that they have seen those pictures of a black smokers lung and a pink non-smokers lung.