I was taking a lot of Ibuprofen due to frequent illnesses while simultaneously needing to be healthy. I started to get terrible heartburn that caused me to hunch over at times. Tried dietary changes. Finally, I happened to read that this and ulcers is a side effect of NSAIDs. Switched to acetaminophen, and was generally more judicious about taking fever meds, and I haven’t had heartburn in months now.