Is there a specialist you can be referred to? I know how it feels not to know why thing happen to youy young child and it is very frustrating! Keep us posted, I have never heard of that. He does look like he feels miserable. Poor baby! My prayers are with you and him.
We are dealing with something similar, they just keep throwing a new antibiotic at it. My son is older -14- but we are on the third month of this. About to go to Progressive Medical. I had problems 6 years ago - no regular doctor could figure out. I had some thyroid issues and kept breaking out in hives - turned out compromised immune system snd then body starting reacting to everything. Mostly foods / allergic to gluten, chicken, dairy, eggs. If you are in Georgia, Atlanta area, I would suggest Progressive Medical or other similar doctors group - they get to cause not just treating symptoms.