I have itchy bumps that look exactly like mosquito bites but I don't think they are
A couple weeks ago, I started getting red spots all over that I thought were mosquito bites. They appeared at night at first, and I leave my window open. However, they seem to have spread, and no one else in my house has been bitten. I know they're not bed bugs, nor do I really think they're any other insect bite because I've changed where I sleep, even sleeping over at other people's houses, and they still appear, sometimes during the day. They behave just like mosquito bites. Maddeningly itchy and a slightly raised bump on the skin. However, I haven't seen any mosquitoes or noticed anything biting me. As far as I know, I'm not allergic to anything, nor do I think I've come in contact with any poisonous plants, especially since this has been going on for a couple of weeks now. Any suggestions?