l have hives around my eyes, but they are going down now.
Can l shower or should l wait?
Will the heat and steam make them worse?

It will feel good so do it.

You can shower but it will need to be a cool shower. The heat & steam will absolutely make them worse. You should not take a hot shower nor bath. Also, why in the shower do not use a loofa that u would scrub over the hives. If u itch or use pressure like scrubbing on them u r releasing more toxins. Just wash up in a cool shower & continue ur medications & u will clear up. If it is itchy Aveeno has a wonderful oatmeal mix by the bubble bath at the store that works wonders too. (good luck!)