Unfortunately, when you realize your assigned caregiver has slathered on scented stuff, damage has already been done. (You in the previous sentence is general you...not you, the poster I quoted, in particular.)
For some of us, it only takes a short whiff. I think it's incredibly thoughtless to wear all the perfume and scented stuff, too. I think I'd rather have people smoke in my room than bombard me with spray-on stink, even though smoke gives me asthma attacks, too. Smoke doesn't hit me as hard as a whiff of certain scents, where my lungs just seem to clamp tight and my skin breaks out immediately upon the presence of those scents. My reaction at times needs to be medicated with some unpleasant medications, you scent-wearing people. Even if you leave the room, your stench lingers and still does damage. Please keep your scents, as best as you can, out of any caregiving situation in which you go. It's not cool to make me sick because you think you bathed inadequately.