ANY extreme allergic or sensitivity reaction can be fatal, but your question is too vague. Which kind of dust? Grain dust, in a silo or granary? Rock dust, in a quarry or stone-dressing workshop? read more
But some of it gets through and causes more-or-less irritation in the bronchial passages and beyond, which can cause mucous accumulation and a chronic cough, and can also be a trigger - or aggravate another trigger - of asthma. THAT can be fatal. read more
Over-the-counter or prescription allergy drugs can help control your symptoms. Antihistamines relieve itching, sneezing, and watery eyes. Decongestants ease or unclog a stuffy nose. Nasal steroids reduce swelling in your nose so you can breathe better. You might be able to get allergy shots (immunotherapy). read more