I have a swollen area just behind my left collar bone that is exasperated when I work stocking supplies. When not working, swelling goes down. I also have a cough, and feel short of breath when working. The swollen area is soft to the touch, and there is no noticeable skin temperature difference.
Hey there,I'll advice you to get done chest X-ray soon and Ultrasonography of that swelling. If needed SOS FNAC of that part.