How long after inhaling cinnamon does 'lasting damage' occur?

You need to go back to the Dr then dont you? No one on here is qualified to give you a diagnosis.

why shouldn’t you take the Cinnamon Challenge?

1. ”Natural ” is not always safe. Just because cinnamon is a naturally-occurring spice — it’s harvested from the dried bark of several Cinnamomum tree species — doesn’t mean it can’t be harmful. Cinnamon is deemed safe for consumption as a food additive under the U.S. Food and Drug Administration’s classification of Generally Recognized As Safe, or GRAS, list. But the FDA is silent on spice inhalation.

2. Cinnamaldehyde rhymes with formaldehyde. The chemical that gives cinnamon its characteristic smell and zing is known as cinnamic aldehyde, or cinnamaldehyde. This means there’s a part of the chemical that acts like formaldehyde that binds and “fixes” human tissue. Do you remember smelling formaldehyde in your high school biology class when dissecting some dead animal? That’s what cinnamaldehyde can do in high concentrations. (Okay, I’m being overly dramatic here. It’s #3 that’s the biggest health problem).

3. Cinnamon is ground tree bark. So not only are you inhaling a tissue fixative, you’re also inhaling powdered bark. That’s why it’s difficult to spit out or, more importantly, get out of your lungs. The cellulose matrix of tree bark acts like a sustained release medicine, but in this case releasing a painful and damaging chemical. The body cannot metabolize cellulose. That’s probably okay for the stuff that’s swallowed. It’ll only burn tomorrow morning at potty time. But the stuff in the lungs is hard to expire. In my grandfather’s day, inhaling coal dust led to a condition called black lung. In my father’s day, people would get a lung cancer called mesothelioma from inhaling asbestos fibers. In 1984, a paper in the British Journal of Industrial Medicine detailed the lung disease and hair and weight loss in Sri Lankan spice workers who process cinnamon quills.

4. Only doing it once can trigger an asthma attack. Doing it once won’t cause any of these chronic illnesses — probably. This 1995 paper in the Indian Journal of Medical Research shows that rats given a single intratracheal dose of cinnamon powder can develop severe lung damage a month later. In humans, inhaling cinnamon powder even once could at least cause an asthma attack, or uncontrollable spasms and narrowing of the bronchioles. While I haven’t yet seen any reports of deaths associated with the Cinnamon Challenge, I would never attempt doing this because I have a history of asthma and try to steer away from anything that might trigger a fatal asthma attack. In fact, I really don’t care for non-fatal asthma attacks. You shouldn’t either.

5. Just because you saw it on YouTube, does that mean you should do it?

That’s what my generation is currently telling their kids.

Friends don’t let friends do the Cinnamon Challenge.

forever