This may be long so I thank you in advance for reading. My husband 41 has had stomach issues all his life. About 8 years ago they escalated. Watery stool every time, weakness, throwing up, joints hurting, loss of muscle mass. We did all the doctors and all the tests. EVERYTHING came back negative. It was very discouraging. Finally it was suggested he quit gluten. We did that about 5 years ago. Things improved. Took about 1 year for the stool to improve. He has not been able to gain weight AT ALL and actually will lose a number of pounds by sweating or any kind of physical labor. Lately it has gotten worse again. He is still gluten free. Now we are back to complete fatigue, watery stool all the time, throwing up. This is not every day. But when it does happen he is down for about 3-4 days and will lose about 4-8 pounds. His muscle mass is deteriorating. I've been doing research and think maybe it might be Small Intestinal bacterial overgrowth SIBO. Is anyone familiar with this? Has anyone had these symptoms? Or are there other bacterial infections that might cause these symptoms when left untreated for a long period?
​Right now the doctors just want him to restart all the same tests that came back negative in the first place. We feel this is not a great approach. Please any give me some suggestions of what might be happening. What kind of doctor can he see that will think outside the box and the normal tests? Thanks for reading this.