Might still be bed bug bites and the itching/irritation varies from person to person. However, they do take awhile to heal up and disappear - 7-14 days. Bed bugs can hide out in any number of locations near where the "host" sleeps so check out other areas like in the seams of the mattress, under nearby furniture, bed frames, closets, clutter near the bed, etc. They can travel over 100 feet but typically stay within 8 feet of the "host" for feeding at night. They look like small cockroaches or can be mistaken for a tick - their bodies are small and flat. Keep in mind, too, that they can go without feeding for over 330 days.