Bloody boogers may indicate bleeding in the nose that mixes with mucus and then dries. ... Afterward, a person should dispose of the tissue and boogers and then wash their hands again.

Nasal congestion is nothing to be sniffed at, according to doctors who argue they could be signs of some underlying health ...

The authors of this specific paper suggest, but do not prove, that microbes or viruses may enter the brain through the nose and could possibly be linked to the development of dementia or Alzheimer's.