&gt;<i>But I also know that I&#x27;m way more subject to allergic reactions when not in my bed. No matter how dusty or dirty is my room, it&#x27;s always worse at someone else&#x27;s place.</i><p>That is because of the different &quot;dust&#x2F;allergen&quot; load in the different places -- to the one in your room you have adjusted already since ages.