Please investigate Mast Cell Activation. Most physicians do not know anything about it. My daughter was diagnosed at Mayo Scottsdale about 6 years ago by Dr Brent Goodman. He also diagnosed POTS and Ehlers Danlos. Those 3 diseases are called "the trifecta". The doctor is a neurologist. Look him up. It looks like he is not still at Mayo but is still affiliated. He might be able to recommend a doctor in your area. Once my daughter got the right medication, SIBO quit coming back. Mast cell has only been a recognized diagnosis for under 20 years, which is why it is difficult to find a doctor.
You can find info about the disorder on the Mayo website and other sites online. She had to find a doctor where she lives and found an allergist who has made mast cell one of her specialties. Feel free to let me know if you have questions. I will answer if I can or if she can.

.