From Longman Dictionary of Contemporary Englishtoo close/near for comforttoo close/near for comfortDANGEROUSsomething that is too close for comfort makes you feel worried, unhappy, or uncomfortable, because it is dangerous in some way The cars were whizzing past us much too close for comfort. → comfort
Examples from the Corpus
too close/near for comfort• At times, the similarities are too close for comfort, edging towards the derivative.• Cross-addictions may be hotly denied because the subject matter may for some be too close for comfort.• Lightning dipped and veered in a manner which was far too close for comfort.• The movement brought him too close for comfort.• In a wave trough I caught a glimpse of a coral head to port: a little too close for comfort.• But our last memory was of a nightingale pair, singing in competition in territories perhaps too close for comfort.• Richard, and you quite see why, finds economy airline seats too close for comfort. 