Earlier this year I started breaking out in hives every day over my entire body, so I went to see an allergist. I wasn't allergic to anything, and after a month of taking zyrtec, they went away. My allergist said that's the #1 reason they see patients, but it is often very difficult to pinpoint the cause.
The past week they've returned again. I've never had any allergies in my life.
Do you break out in hives? What causes them?