A king once had a special crown made for the love of his life – adorned with priceless huge diamonds and gems, and when she put it on, one of the diamonds pressed very painfully into her skull, what to do? She wasn't about to get rid of the diamond. So she went out consulting, and everyone was at a loss how it was at all possible that the King's jeweler would design such a faulty crown. Eventually someone examined her head and determined that she had a tumor growing in that spot which was pushing up against the diamond, and immediately she had the life-threatening tumor removed, and then the diamond fit snugly and comfortably.
This is an embellished version of a parable Rabbainu revealed in his Likutay Moharan, end of Torah 6, explaining how every Jew is a beautiful precious gem in the crown of HY, and if one suffers offense from another Jew, he must examine himself and determine what it is that he needs to fix, why is this diamond not adjusting well with him?!
Na Nach Nachma Nachman MeUman!