A brief, honest description of what she'll feel gives Alex something concrete to hold onto, which tends to be more calming for an anxious patient than vague reassurance or dismissiveness.

Verifying the order and gathering supplies comes first, then privacy and positioning, then a clean-glove visual check of the meatus before anything touches the sterile field. Sterile cleansing, insertion, and drainage follow, and measuring output plus documentation always comes last.

This explains the likely cause in terms Alex can understand, normalizes a common post-op issue, and reduces anxiety by giving her a clear reason instead of leaving her to wonder if something is seriously wrong.