Are you wounded?
Have you ever tried to put some water on a fresh wound? If you have, you must have felt some pain. Water, which can never harm you if you were not injured, has just made you feel some pain when it touched your wound, simply because when we develop a wound we tend to become over sensitive to factors that didn’t bother us before.
The same goes for emotional wounds: What if you have some emotional wounds that are making you over-sensitive to factors that other people don’t even notice? All of these small things that are bothering you may be harmless on their own, but they hurt you because they touch your wounds just like the water did.