The flea bites could have caused the bites you mention. Another possible cause is the bedbugs. You have dealt with this problem correctly. Apply calamine lotion to the bite marks.
Your son's ongoing restlessness and discomfort is of concern. He seems worse on the Lactogen whch raises the possibility that he has a lactose intolerance problem. Take him off the Lactogen and also off all other dairy products such as yoghurt. Try him on a soya formula such as Isomil2 and see if he improves.
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