How do I stop ruminating about something that my coworker did (e. g. condescending remark) and how do confront them about it?

She mentioned using common sense when I was asking her for help with something technical I was struggling with. She ended up helping me, but I don't understand how what we were doing has anything to do with common sense. I was thinking of talking to her in private that her remark bothered me (happened today) but I don't know how to go about doing it. This is not the first time she has said/written something condescending. Last time, she wrote something condescending to me... comment saying I am going to take several hrs to do something (that only takes me like 30 minutes to do)... I shared that message with trusted coworker and they agreed it was condescending.

How should I confront her and establish boundaries?

Thank you in advance.

How do I stop ruminating about something that my coworker did (e. g. condescending remark) and how do confront them about it?
Post Opinion