I'm an eighteen-year-old female who has been suffering intermittent red, bumpy, itchy skin rashes for about a week now: they originally occurred at night and having been consistently appearing most intensely and over the widest surface area during the night (but do occur during the day as well). By what I have seen, they look practically identical to the pictures of hive rashes online. They are occurring basically everywhere: ankles, elbows, abdomen, back, knuckles, backs of the hands, forehead, but most consistently on my inner thighs, the back of my upper legs and my underarms. Usually, they go away after the night but then appear somewhere else and stay for another few hours.
When I look up "hives," most websites say they are usually in reaction to some allergen. When I first got them at night in my home, I had not been in contact with anything out of the ordinary. Then I had to go on a trip for about three days; I was wearing clean clothes and was using different soaps and sheets and eating other foods, but the rashes continued to come and go. Now, I have been back at home for about three days, back in contact with what I usually am and the rashes continue.
What on earth is causing these hive-like rashes?