What is "the treatment?" In the book Wringer by Jerry Spinelli?

"The Treatment", which is administered as a celebration on all of the boys' birthdays, is Farquar's memorable knuckle punch.

"The Treatment", which is a special bonding time for all boys on their birthdays, is given by Farquar. Farquar has a very painful knuckle punch, and each boy must choose which arm, roll up their sleeve, and get punched. For example, if you were ten, you got punched ten times.