Bedbugs – NHS

Bedbugs can hide in many places, including on bed frames, mattresses, clothing, furniture, behind pictures and under loose wallpaper. Signs of bedbugs include: bites – often on areas exposed while sleeping, like the face, neck and arms; spots of blood on your bedding – from the bites or from squashing a bedbug

https://www.nhs.uk/conditions/bedbugs/