pain point
n.— «One school of thought holds that companies should focus on a critical “pain point” and buy whatever software product meets that immediate need.» —“In Your Face” by Scott Leibs CFO Magazine July 1, 2000. (source: Double-Tongued Dictionary)
Further reading
In an article in The Atlantic magazine, humorist Mark Twain quoted a sing-songy bit of doggerel about conductors punching railroad fares that illustrates how colored paper has long been used to encode information. This is part of a complete episode...
A physician in Blowing Rock, North Carolina, shares some of the vocabulary of his patients from Appalachia. There, a misery is anything painful, such as a misery in my jaw if they have a painful tooth or a misery in my back if they have lumbar pain...