http://revach.net/article.php?id=3977

Section: Shabbos   Category: Story
Rav Shmuel Aharon Yudelevitch Suffers Far More Than A Tooth Ache
One Friday night the great tzaddik Rav Shmuel Aharon Yudelevitch, the son-in-law of Rav Aryeh Levine and the brother-in-law of ybc"l Rav Elyashiv, had a terrible tooth ache.  He suffered terribly the whole night in obvious pain to all those around him.  Finally near the morning as it got worse he figured out a way to put some ointment on the pain in a halachicly permissible manner.

Later that shabbos he still looked like he was in terrible agony and someone asked why, since he had already relieved his pain.  He answered that he was thinking over what he did with the ointment and was now questioning his method wondering if it involved possibly a slight chashash of Chilul Shabbos.  Believe me he said, the pain I had from the tooth ache pales in comparison to the pain I am feeling now!