Study suggests possible link between nose picking and Alzheimer’s

Over 90 percent of people pick their nose, and although it may seem harmless, according to a new study, it may have some not-so-good consequences.

Fingers in the nose can damage lining, causing crusting, tissue damage and nose bleeds. Some are looking into the theory that damage to nasal lining can facilitate transmission of bacteria and germs to the brain, which can trigger inflammation and cause amyloid plaque to form. These are some of the hallmarks of Alzheimer’s disease. Some scientists believe there could be a link between the nasal cavity and the central nervous system, which is what they’re exploring.

A 2023 study suggested that Alzheimer’s neuroinflammation “might be partially caused” by pathogens entering the brain via the olfactory system. Neurosurgeons suggest practicing good nose hygiene to avoid damaging the lining of the nose. This may include not picking your nose, or at least being very careful with it.