How to spot them
look for any unexplained skin rash or itchy bump (although not everyone develops this)
look out for black spots on your mattress – this could be their dried faeces
look for mottled shells that bedbugs may have shed
check your sheets for blood spots where you may have rolled over and squashed a bug after it had fed
inspect all the crevices and joints of your mattress and furniture using a torch, and see if you can spot any bugs
there may be an unpleasant, musty scent in rooms with a large infestation – adult bedbugs produce this odour with their scent glands when disturbed