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Hi, Dr. Mo here with JA. Please let me review the information and I'll reply shortly.
It could either be due to allergies, or urticaria, or due to bed bugs.
Do you have pictures of these bites?
The fact that it only happens when you are in a particular environment makes it highly suspect that it is in fact an allergy. Usually when this happens I advise changing sheets and if it's severe to start on either benadryl or zyrtec.
There are conditions of night time itching associated with anxiety and stress but that happens usually right before falling asleep and throughout the whole night so I don't think it's that.
Please let me know if you have further questions.
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