Bed or furniture bugs. More often, such a clinic occurs when bed bugs start in bed linen or in a bed. They do not always arise due to poor hygiene, they can "penetrate" into your house with new bedding or with new furniture. And even if you rip apart the upholstery of your bed, you will find the eggs of these bedbugs, a nightmare sight. So change your underwear first. If it doesn't help, then the bed.
fleas can be, especially if you live on the ground floor in the south. and not to bite some people, and to eat others mercilessly. look on the internet for pictures of bites.
there may be more midges. I took a walk in the evening, and during the day too, the next day I was gnawed all over.