The areas start out very much like a hive (red, blotchy, extremely itchy skin), but, unlike hives, end up leaving a red papule with the occasional white center that stick around for days to weeks.
To provide some context, this all started after seeking treatment for mild
acne (whiteheads on my forehead and extremely oily skin) about 3 years ago. The dermatologist I saw then prescribed Ziana gel, which worked relatively well (never completely cleared the whitehead problem, though it helped).