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.
Your lungs have little hairs called cilia. Mucus traps particulate matter and then the cilia moves mucus out of the lungs. If you are a smoker you are coughing because your lungs are trying to move mucus (that is filled with particulate matter) out of your body. If you find yourself in a city with smog you might find yourself coughing, same process in action. If you have allergies same thing, the body is trying to 'flush' the toxins out of your body. Anyway, the particulate matter from a cigarette is around 920 parts per million (after 3 minutes of smoking).