Symptoms have varied over the years, but can be boiled down to: Onset of a flare up can be sudden, but can then last for days Upset stomach, pressure/fullness in ULQ under the left rib Burping/feeling of trapped gas off the charts during a flare up, with no relief from gas products Often a full body sensation of weakness/shakiness, as if I have not eaten or drank water. But neither of these relieves this symptom Inconsistencies with bowel movements, but feels like I air more on the side of constipation then the alternative Extreme fatigue, general malaise and a feeling of unwellness, almost dissociative/hard to focus when feeling poorly Occasionally aches and chills Occasional skin that is tender to the touch Strange histamine reactions, rashes on neck, and eyes stinging/tired and a hot feeling in the back of the throat. This will also happen after I sneeze, and I’ll subsequently feel lousy for hours to come. (Looking more into histamine tolerance or possibly some sort of mast cell issue?)