3 weeks ago i tried a new body wash and my skin got red, blotchy, swollen, and hot. I went to a clinic and, never before having allergies, got a shot to clear it up along with some meds. it came back, then went away (back to the old soap again). Now, every once in a while, it comes back, and I'm not sure if it's stress or what. It's mostly on my arms and legs, and is sometimes itchy. Any ideas?