03/07/2025
So... everyone's getting sick. It goes through the whole family, right? Obviously something is spreading. We've been taught that it's those nasty little bacteria or viruses. What else could it be?!
Well here's something to consider. An unexpected experience of fear can cause bronchial tissue to ulcerate. This is an instinctive reaction for the purpose of widening those air passages. (Think of the quick inhale you take when you're startled.) Then, when the fear has passed, your body regrows that tissue. This process involves inflammation, higher temperature, and microbes - symptoms we call being sick. And here's the kicker! How does that spread to those around us?
This is just one alternative to what you thought you knew:
https://youtube.com/shorts/thCX62D5q64?si=B6RDZt3dXqBaKKsv
Studies suggest humans can unconsciously detect fear in others through the unique chemical signature in their sweat, triggering a heightened fear response in brain regions associated with fear. [1, 2, 3]
Here's a more detailed look at the research: [1, 2, 3]
• The "Smell of Fear": Research indicates that the sweat of fearful individuals contains a distinct odor that can be detected by others. [1, 2, 3]
• How it Works: The apocrine sweat glands in the armpit, responsible for chemosignal production, contain receptors for adrenalin. The rapid stress response system (sympathetic-adrenal medullary system) is thought to drive the release of fear sweat. [3]
• Fear Contagion: Exposure to the sweat of fearful individuals can induce a similar state in receivers, evidenced by fearful facial expressions and vigilant behavior. [3]
• Brain Response: Studies have shown that the smell of fear triggers a heightened response in brain regions associated with fear. [1]
• Examples of Studies: [1]
• One study investigated the underarm secretions of petrified skydivers and found that the smell of fear triggered a heightened response in brain regions associated with fear when inhaled by volunteers in a brain scanner. [1]
• Another study found that women become more risk-averse and less trusting of others when exposed to the odor of anxiety-induced body sweat. [4]
• Research Focus: Researchers are exploring the potential for using the "smell of fear" as a tool for understanding and managing fear and anxiety. [5, 6]
[1] https://www.theguardian.com/science/2008/dec/03/fear-smell-pheromone
[2] https://pmc.ncbi.nlm.nih.gov/articles/PMC8726592/
[3] https://pmc.ncbi.nlm.nih.gov/articles/PMC4344325/
[4] https://www.psypost.org/smelling-fear-study-provides-evidence-that-chemosensory-anxiety-signals-reduce-trust-and-risk-taking-in-women/
[5] https://magazine.hms.harvard.edu/articles/connections-between-smell-memory-and-health
[6] https://pubmed.ncbi.nlm.nih.gov/12011790/