question #3 Sahih al-Bukhari 5665, Book 75, Hadith 25 : What is the significance of making expiation in Islamic teachings when dealing with personal discomforts?

The Prophet (ﷺ) passed by me while I was kindling a fire under a (cooking) pot. He said, “Do the lice of
your head trouble you?” I said, “Yes.” So he called a barber to shave my head and ordered me to make
expiation for that.”