I've had increasing problems with this. Mostly intense crying when Angels it frustrated, that leaves as soon as I drop trying to communicate. I've thought lately it must be a progression of Lyme disease, perhaps undiagnosed MS... Perhaps a Harbinger of pending decline of cognition. The literature calls it " rare". There's no mention of it in ME/CFS. BUT... DOES IT OCCUR in CFS? AND WHAT DOES IT MEAN? I have no Alzheimer's genes and a normal MRI; increasing tremors, neuropathic itch, something new every year or so that no one pays attention to. I don't sense any cognitive decline. Brain fog isn't a problem. I can't make a point when frustrated without crying; extremely humiliating if at the Dr. Women think I "turn on the waterworks for sympathy". They tell me to stop. I can't. Then it's suddenly gone. I was never this way. Never sentimental even. I went through a horrific divorce at the height of my CFS, blamed it for years on Loss, etc. Now it's clear it comes on like a storm, usually when frustrated or angry, and is over and I feel nothing in a minute or so. It's not depression. Fatigue might make it more common, but it happens in good days too. Anybody else?