Noun; the act of deep remorse for not updating your blog more often due to life, taxes, clients and epic middle school ancient Egypt projects.
Grows quickly and exponentially and will soon end up bigger than a bread box.
The only known antidote is to stop the bleeding! Sit down and start writing, for goodness sake!
Early diagnosis is helpful but doesn't necessarily shorten the duration.
Healthy sprinkling of condolences and/or apologies often greeted with quizzical expression. Only the afflicted appears to be in discomfort.