Rash because of bubble bath 😤

So, I’ve always had eczema and rashes from a autoimmune disease. I recently about 2 months ago got on dupixent (shot for the skin) because I’ve had a full body rash that stayed every single day for 3 years. My skin has been crystal clear besides my legs. The rash on my legs is caused from inflammation from my autoimmune disease so the shot won’t get rid of it I gotta get my blood work under control for that to happen. But my dumbass was like oh maybe I can take a scented bubble bath again. I use to LOVE taking lavender baths but once I turned 20 and got sick from a autoimmune disease my skin just can’t take it anymore, but I figured since being on a skin shot I can. But 13 hours later after a bubble bath ( very relaxing bubble bath might I add) I got a rash on my arm 😤😭 guess I’ll Apply little bit of steroid cream 😡