Looking at the above images, it is clear that what we see is a skin reaction. We do not see what the skin reaction is in response to. The perpetrators have already left the scene.
Most people would be overloaded with emotions when dealing with issues of Bed bugs in their resting quarters. And rightfully so. So it is very important to take time to observe and understand what constitutes a problem and what is just an incorrect perception.
So please understand that Bed Bug bites are not any more horrible looking than mosquito or flea bites. Actually skin reaction of Bed Bug bites varies from person to person. Also, over 20% of the population has very little to no reaction to bed bug bites!
It is not so uncommon for people sharing same bed and having very different experience to bed bug bites.
If a human host sleeps like a rock, bed bugs can feed in peace, they will drink in one go. If on the other hand a host is already tossing and turning, bed bugs may not be able to feed in single instance but may complete their meal in a few instances.