@piross1528 I have identical symptoms it seems while on omeprazole for 3-4 years for GERD. Have had peripheral neuropathy and even have been getting treated with IVIG. Wondering if it could be the omeprazole now. Are you better after stopping the PPIs? What exactly were your symptoms? I have had night sweats, facial itching, had and feet numbness and tingling, then even some imbalance and stumbling. Responds to IVIG but wondering if I just need to quit the PPI. Also had a recent bout of diarrhea coming and going for the last 6 weeks. Stopped the PPI and the diarrhea was better the next day.